Page: Textbook - Chapter 7
Chapter 7. Growing and Developing
7. Growing and Developing
The Repository for Germinal Choice
During the 1970s, American millionaire Robert Klark Graham began one of the most controversial and
unique sperm banks in the world. He called it the Repository for Germinal Choice. The sperm bank was part
of a project that attempted to combat the “genetic decay” Graham saw all around him. He believed human
reproduction was experiencing a genetic decline, making for a population of “retrograde humans,” and he
was convinced that the way to save the human race was to breed the best genes of his generation (Plotz,
2001).
Graham began his project by collecting sperm samples from the most intelligent and highly achieving people
he could find, including scientists, entrepreneurs, athletes, and even Nobel Prize winners. Then he advertised
for potential mothers, who were required to be married to infertile men, educated, and financially welloff.
Graham mailed out catalogues to the potential mothers, describing the donors using code names such
as “Mr. Grey-White,” who was “ruggedly handsome, outgoing, and positive, a university professor, expert
marksman who enjoys the classics,” and “Mr. Fuchsia,” who was an “Olympic gold medalist, tall, dark,
handsome, bright, a successful businessman and author” (Plotz, 2001). When the mother had made her
choice, the sperm sample was delivered by courier and insemination was carried out at home. Before it
closed following Graham’s death in 1999, the repository claimed responsibility for the birth of 228 children.
But did Graham’s project actually create superintelligent babies? Although it is difficult to be sure, because
very few interviews with the offspring have been permitted, at least some of the repository’s progeny are
indeed smart. Reporter for Slate magazine David Plotz (2001) spoke to nine families who benefited from the
repository, and they proudly touted their children’s achievements. He found that most of the offspring in the
families interviewed seem to resemble their genetic fathers. Three from donor Mr. Fuchsia, the Olympic gold
medallist, are reportedly gifted athletes. Several who excel in math and science were fathered by professors
of math and science.
And the offspring, by and large, seem to be doing well, often attending excellent schools and maintaining
very high grade-point averages. One of the offspring, now 26 years old, is particularly intelligent. In infancy,
he could mark the beat of classical music with his hands. In kindergarten, he could read Hamlet and was
learning algebra, and at age six his IQ was already 180. But he refused to apply to prestigious universities,
such as Harvard or Yale, opting instead to study at a smaller progressive college and to major in comparative
religion, with the aim of becoming an elementary schoolteacher. He is now an author of children’s books.
Although it is difficult to know for sure, it appears that at least some of the children of the repository
are indeed outstanding. But can the talents, characteristics, and skills of this small repository sample be
attributed to genetics alone? After all, consider the parents of these children: Plotz reported that the parents,
particularly the mothers, were highly involved in their children’s development and took their parental
roles very seriously. Most of the parents studied child care manuals, coached their children’s sports teams,
practised reading with their kids, and either home-schooled them or sent them to the best schools in their
251
areas. And the families were financially well-off. Furthermore, the mothers approached the repository at a
relatively older child-bearing age, when all other options were exhausted. These children were desperately
wanted and very well loved. It is undeniable that, in addition to their genetic backgrounds, all this excellent
nurturing played a significant role in the development of the repository children.
Although the existence of the repository provides interesting insight into the potential importance of genetics
on child development, the results of Graham’s experiment are inconclusive. The offspring interviewed are
definitely smart and talented, but only one of them was considered a true genius and child prodigy. And
nurture may have played as much a role as nature in their outcomes (Olding, 2006; Plotz, 2001).
The goal of this chapter is to investigate the fundamental, complex, and essential process of human development.
Development refers to the physiological, behavioural, cognitive, and social changes that occur throughout human
life, which are guided by both genetic predispositions (nature) and by environmental influences (nurture). We will
begin our study of development at the moment of conception, when the father’s sperm unites with the mother’s
egg, and then consider prenatal development in the womb. Next we will focus on infancy, the developmental stage
that begins at birth and continues to one year of age, and childhood, the period between infancy and the onset of
puberty. Finally, we will consider the developmental changes that occur during adolescence — the years between
the onset of puberty and the beginning of adulthood; the stages of adulthood itself, including emerging, early,
middle, and older adulthood; and the preparations for and eventual facing of death.
Each of the stages of development has its unique physical, cognitive, and emotional changes that define the
stage and that make each one unique from the others. The psychologist and psychoanalyst Erik Erikson (1963, p.
202) proposed a model of life-span development that provides a useful guideline for thinking about the changes we
experience throughout life. As you can see in Table 7.1, “Challenges of Development as Proposed by Erik Erikson,”
Erikson believed that each life stage has a unique challenge that the person who reaches it must face. And according
to Erikson, successful development involves dealing with and resolving the goals and demands of each of the life
stages in a positive way.
7. GROWING AND DEVELOPING • 252
Table 7.1 Challenges of Development as Proposed by Erik Erikson. Adapted from Erikson (1963).
[Skip Table]
Stage Age range Key challenge Positive resolution of challenge
Oralsensory
Birth to 12 to
18 months
Trust versus
mistrust The child develops a feeling of trust in his or her caregivers.
Muscularanal
18 months to 3
years
Autonomy versus
shame/doubt
The child learns what he or she can and cannot control and develops a
sense of free will.
Locomotor 3 to 6 years Initiative versus
guilt
The child learns to become independent by exploring, manipulating,
and taking action.
Latency 6 to 12 years Industry versus
inferiority
The child learns to do things well or correctly according to standards
set by others, particularly in school.
Adolescence 12 to 18 years Identity versus role
confusion
The adolescent develops a well-defined and positive sense of self in
relationship to others.
Young
adulthood 19 to 40 years Intimacy versus
isolation
The person develops the ability to give and receive love and to make
long-term commitments.
Middle
adulthood 40 to 65 years Generativity
versus stagnation
The person develops an interest in guiding the development of the next
generation, often by becoming a parent.
Late
adulthood 65 to death Ego integrity
versus despair The person develops acceptance of his or her life as it was lived.
As we progress through this chapter, we will see that Robert Klark Graham was in part right — nature does play a
substantial role in development (it has been found, for instance, that identical twins, who share all of their genetic
code, usually begin sitting up and walking on the exact same days). But nurture is also important — we begin to be
influenced by our environments even while still in the womb, and these influences remain with us throughout our
development. Furthermore, we will see that we play an active role in shaping our own lives. Our own behaviour
influences how and what we learn, how people respond to us, and how we develop as individuals. As you read the
chapter, you will no doubt get a broader view of how we each pass through our own lives. You will see how we
learn and adapt to life’s changes, and this new knowledge may help you better understand and better guide your
own personal life journey.
References
Erikson, E. H. (1963). Childhood and society. New York, NY: Norton.
Olding, P. (2006, June 15). The genius sperm bank. BBC News. Retrieved from http://www.bbc.co.uk/sn/tvradio/
programmes/horizon/broadband/tx/spermbank/doron/index_textonly.shtml
Plotz, D. (2001, February 8). The “genius babies,” and how they grew. Slate. Retrieved from http://www.slate.com/
id/100331
253 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
7.1 Conception and Prenatal Development
Learning Objectives
1. Review the stages of prenatal development.
2. Explain how the developing embryo and fetus may be harmed by the presence of teratogens
and describe what a mother can do to reduce her risk.
Conception occurs when an egg from the mother is fertilized by a sperm from the father. In humans, the conception
process begins with ovulation, when an ovum, or egg (the largest cell in the human body), which has been stored
in one of the mother’s two ovaries, matures and is released into the fallopian tube. Ovulation occurs about halfway
through the woman’s menstrual cycle and is aided by the release of a complex combination of hormones. In addition
to helping the egg mature, the hormones also cause the lining of the uterus to grow thicker and more suitable for
implantation of a fertilized egg.
If the woman has had sexual intercourse within one or two days of the egg’s maturation, one of the up to 500 million
sperm deposited by the man’s ejaculation, which are travelling up the fallopian tube, may fertilize the egg. Although
few of the sperm are able to make the long journey, some of the strongest swimmers succeed in meeting the egg. As
the sperm reach the egg in the fallopian tube, they release enzymes that attack the outer jellylike protective coating
of the egg, each trying to be the first to enter. As soon as one of the millions of sperm enters the egg’s coating,
the egg immediately responds by both blocking out all other challengers and at the same time pulling in the single
successful sperm.
The Zygote
Within several hours of conception, half of the 23 chromosomes from the egg and half of the 23 chromosomes from
the sperm fuse together, creating a zygote — a fertilized ovum. The zygote continues to travel down the fallopian
tube to the uterus. Although the uterus is only about four inches away in the woman’s body, the zygote’s journey is
nevertheless substantial for a microscopic organism, and fewer than half of zygotes survive beyond this earliest
stage of life. If the zygote is still viable when it completes the journey, it will attach itself to the wall of the uterus,
but if it is not, it will be flushed out in the woman’s menstrual flow. During this time, the cells in the zygote continue
to divide: the original two cells become four, those four become eight, and so on, until there are thousands (and
eventually trillions) of cells. Soon the cells begin to differentiate, each taking on a separate function. The earliest
differentiation is between the cells on the inside of the zygote, which will begin to form the developing human
being, and the cells on the outside, which will form the protective environment that will provide support for the new
life throughout the pregnancy.
254
The Embryo
Once the zygote attaches to the wall of the uterus, it is known as the embryo. During the embryonic phase, which
will last for the next six weeks, the major internal and external organs are formed, each beginning at the microscopic
level, with only a few cells. The changes in the embryo’s appearance will continue rapidly from this point until
birth.
While the inner layer of embryonic cells is busy forming the embryo itself, the outer layer is forming the
surrounding protective environment that will help the embryo survive the pregnancy. This environment consists of
three major structures: The amniotic sac is the fluid-filled reservoir in which the embryo (soon to be known as a
fetus) will live until birth, and which acts as both a cushion against outside pressure and as a temperature regulator.
The placenta is an organ that allows the exchange of nutrients between the embryo and the mother, while at the
same time filtering out harmful material. The filtering occurs through a thin membrane that separates the mother’s
blood from the blood of the fetus, allowing them to share only the material that is able to pass through the filter.
Finally, the umbilical cord links the embryo directly to the placenta and transfers all material to the fetus. Thus
the placenta and the umbilical cord protect the fetus from many foreign agents in the mother’s system that might
otherwise pose a threat.
The Fetus
Beginning in the ninth week after conception, the embryo becomes a fetus. The defining characteristic of the fetal
stage is growth. All the major aspects of the growing organism have been formed in the embryonic phase, and now
the fetus has approximately six months to go from weighing less than an ounce to weighing an average of six to
eight pounds. That’s quite a growth spurt.
The fetus begins to take on many of the characteristics of a human being, including moving (by the third month
the fetus is able to curl and open its fingers, form fists, and wiggle its toes), sleeping, as well as early forms of
swallowing and breathing. The fetus begins to develop its senses, becoming able to distinguish tastes and respond to
sounds. Research has found that the fetus even develops some initial preferences. A newborn prefers the mother’s
voice to that of a stranger, the languages heard in the womb over other languages (DeCasper & Fifer, 1980; Moon,
Cooper, & Fifer, 1993), and even the kinds of foods that the mother ate during the pregnancy (Mennella, Jagnow,
& Beauchamp, 2001). By the end of the third month of pregnancy, the sexual organs are visible.
How the Environment Can Affect the Vulnerable Fetus
Prenatal development is a complicated process and may not always go as planned. About 45% of pregnancies result
in a miscarriage, often without the mother ever being aware it has occurred (Moore & Persaud, 1993). Although
the amniotic sac and the placenta are designed to protect the embryo, substances that can harm the fetus, known
as teratogens, may nevertheless cause problems. Teratogens include general environmental factors, such as air
pollution and radiation, but also the cigarettes, alcohol, and drugs that the mother may use. Teratogens do not always
harm the fetus, but they are more likely to do so when they occur in larger amounts, for longer time periods, and
during the more sensitive phases, as when the fetus is growing most rapidly. The most vulnerable period for many
of the fetal organs is very early in the pregnancy — before the mother even knows she is pregnant.
Harmful substances that the mother ingests may harm the child. Cigarette smoking, for example, reduces the
blood oxygen for both the mother and child and can cause a fetus to be born severely underweight. Another
serious threat is fetal alcohol syndrome (FAS), a condition caused by maternal alcohol drinking that can lead
to numerous detrimental developmental effects, including limb and facial abnormalities, genital anomalies, and
255 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
mental retardation. Each year in Canada, it is estimated that nine babies in every 1,000 are born with fetal alcohol
spectrum disorder (FASD), and it is considered one of the leading causes of retardation in the world today (Health
Canada, 2006; Niccols, 1994). Because there is no known safe level of alcohol consumption for a pregnant woman,
the Public Health Agency of Canada (2011) states that there is no safe amount or safe time to drink alcohol during
pregnancy. Therefore, the best approach for expectant mothers is to avoid alcohol completely. Maternal drug abuse
is also of major concern and is considered one of the greatest risk factors facing unborn children.
Figure 7.1 Performing Prenatal Screening. Prenatal screenings, including a sonogram, help detect
potential birth defects and other potentially dangerous conditions.
The environment in which the mother is living also has a major impact on infant development (Duncan & Brooks-
Gunn, 2000; Haber & Toro, 2004). Children born into homelessness or poverty are more likely to have mothers who
are malnourished, who suffer from domestic violence, stress, and other psychological problems, and who smoke
or abuse drugs. And children born into poverty are also more likely to be exposed to teratogens. Poverty’s impact
may also amplify other issues, creating substantial problems for healthy child development (Evans & English, 2002;
Gunnar & Quevedo, 2007).
Mothers normally receive genetic and blood tests during the first months of pregnancy to determine the health of
the embryo or fetus. They may undergo sonogram, ultrasound, amniocentesis, or other testing (Figure 7.1). The
screenings detect potential birth defects, including neural tube defects, chromosomal abnormalities (such as Down
syndrome), genetic diseases, and other potentially dangerous conditions. Early diagnosis of prenatal problems can
allow medical treatment to improve the health of the fetus.
Key Takeaways
• Development begins at the moment of conception, when the sperm from the father merges with
the egg from the mother.
• Within a span of nine months, development progresses from a single cell into a zygote and then
into an embryo and fetus.
7.1 CONCEPTION AND PRENATAL DEVELOPMENT • 256
• The fetus is connected to the mother through the umbilical cord and the placenta, which allow the
fetus and mother to exchange nourishment and waste. The fetus is protected by the amniotic sac.
• The embryo and fetus are vulnerable and may be harmed by the presence of teratogens.
• Smoking, alcohol use, and drug use are all likely to be harmful to the developing embryo or fetus,
and the mother should entirely refrain from these behaviours during pregnancy or if she expects to
become pregnant.
• Environmental factors, especially homelessness and poverty, have a substantial negative effect on
healthy child development.
Exercises and Critical Thinking
1. What behaviours must a woman avoid engaging in when she decides to try to become pregnant,
or when she finds out she is pregnant? Do you think the ability of a mother to engage in healthy
behaviours should influence her choice to have a child?
2. Given the negative effects of poverty on human development, what steps do you think societies
should take to try to reduce poverty?
References
DeCasper, A. J., & Fifer, W. P. (1980). Of human bonding: Newborns prefer their mothers’ voices. Science, 208,
1174–1176.
Duncan, G., & Brooks-Gunn, J. (2000). Family poverty, welfare reform, and child development. Child
Development, 71(1), 188–196.
Evans, G. W., & English, K. (2002). The environment of poverty: Multiple stressor exposure, psychophysiological
stress, and socio-emotional adjustment. Child Development, 73(4), 1238–1248.
Gunnar, M., & Quevedo, K. (2007). The neurobiology of stress and development. Annual Review of Psychology,
58, 145–173.
Haber, M., & Toro, P. (2004). Homelessness among families, children, and adolescents: An ecologicaldevelopmental
perspective. Clinical Child and Family Psychology Review, 7(3), 123–164.
Health Canada. (2006). It’s your health: Fetal alcohol spectrum disorder [PDF]. Retrieved June 2014
from http://www.hc-sc.gc.ca/hl-vs/alt_formats/pacrb-dgapcr/pdf/iyh-vsv/diseases-maladies/fasd-etcaf-eng.pdf
Mennella, J. A., Jagnow, C. P., & Beauchamp, G. K. (2001). Prenatal and postnatal flavor learning by human
infants. Pediatrics, 107(6), e88.
257 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Moon, C., Cooper, R. P., & Fifer, W. P. (1993). Two-day-olds prefer their native language. Infant Behavior &
Development, 16, 495–500.
Moore, K., & Persaud, T. (1993). The developing human: Clinically oriented embryology (5th ed.). Philadelphia,
PA: Saunders.
Niccols, G. A. (1994). Fetal alcohol syndrome: Implications for psychologists. Clinical Psychology Review, 14,
91–111.
Public Health Agency of Canada. (2011). The healthy pregnancy guide. Retrieved May 10, 2014
from http://www.phac-aspc.gc.ca/hp-gs/guide/index-eng.php
Image Attributions
Figure 7.1: “Leipzig, Universit.tsklinik, Untersuchung” by Grubitzsch (http://en.wikipedia.org/wiki/
File:Bundesarchiv_Bild_183-1990-0417-001,_Leipzig,_Universit%C3%A4tsklinik,_Untersuchung.jpg) is licensed
under CC BY-SA 3.0 DE (http://creativecommons.org/licenses/by-sa/3.0/de/deed.en).
7.1 CONCEPTION AND PRENATAL DEVELOPMENT • 258
7.2 Infancy and Childhood: Exploring and Learning
Learning Objectives
1. Describe the abilities that newborn infants possess and how they actively interact with their
environments.
2. List the stages in Piaget’s model of cognitive development and explain the concepts that are
mastered in each stage.
3. Critique Piaget’s theory of cognitive development and describe other theories that complement
and expand on it.
4. Summarize the important processes of social development that occur in infancy and childhood.
If all has gone well, a baby is born sometime around the 38th week of pregnancy. The fetus is responsible, at least in
part, for its own birth because chemicals released by the developing fetal brain trigger the muscles in the mother’s
uterus to start the rhythmic contractions of childbirth. The contractions are initially spaced at about 15-minute
intervals but come more rapidly with time. When the contractions reach an interval of two to three minutes, the
mother is requested to assist in the labour and help push the baby out.
The Newborn Arrives With Many Behaviours Intact
Newborns are already prepared to face the new world they are about to experience. As you can see in Table 7.2,
“Survival Reflexes in Newborns,” babies are equipped with a variety of reflexes, each providing an ability that will
help them survive their first few months of life as they continue to learn new routines to help them survive in and
manipulate their environments.
259
Table 7.2 Survival Reflexes in Newborns.
[Skip Table]
Name Stimulus Response Significance
Video
Example
Rooting
reflex
The baby’s cheek is
stroked.
The baby turns its head
toward the stroking, opens its
mouth, and tries to suck.
Ensures the infant’s feeding will
be a reflexive habit
Watch “The
Rooting
Reflex”
[YouTube]
Blink
reflex
A light is flashed in the
baby’s eyes. The baby closes both eyes. Protects eyes from strong and
potentially dangerous stimuli
Watch “Baby
Blinking”
[YouTube]
Withdrawal
reflex
A soft pinprick is applied
to the sole of the baby’s
foot.
The baby flexes the leg. Keeps the exploring infant away
from painful stimuli
Watch “Baby
Withdraw
Reflex”
[YouTube]
Tonic neck
reflex
The baby is laid down on
its back.
The baby turns its head to one
side and extends the arm on
the same side.
Helps develop hand-eye
coordination
Watch
“Tonic Neck
Reflex”
[YouTube]
Grasp
reflex
An object is pressed into
the palm of the baby.
The baby grasps the object
pressed and can even hold its
own weight for a brief period.
Helps in exploratory learning
Watch
“Grasp
reflex”
[YouTube]
Moro
reflex
Loud noises or a sudden
drop in height while
holding the baby.
The baby extends arms and
legs and quickly brings them
in as if trying to grasp
something.
Protects from falling; could have
assisted infants in holding on to
their mothers during rough
travelling
Watch “Moro
Reflex”
[YouTube]
Stepping
reflex
The baby is suspended
with bare feet just above a
surface and is moved
forward.
Baby makes stepping motions
as if trying to walk.
Helps encourage motor
development
Watch
“Stepping
Reflex”
[YouTube]
In addition to reflexes, newborns have preferences — they like sweet-tasting foods at first, while becoming more
open to salty items by four months of age (Beauchamp, Cowart, Menellia, & Marsh, 1994; Blass & Smith,
1992). Newborns also prefer the smell of their mothers. An infant only six days old is significantly more likely to
turn toward its own mother’s breast pad than to the breast pad of another baby’s mother (Porter, Makin, Davis, &
Christensen, 1992), and a newborn also shows a preference for the face of its own mother (Bushnell, Sai, & Mullin,
1989).
Although infants are born ready to engage in some activities, they also contribute to their own development through
their own behaviours. The child’s knowledge and abilities increase as it babbles, talks, crawls, tastes, grasps, plays,
and interacts with the objects in the environment (Gibson, Rosenzweig, & Porter, 1988; Gibson & Pick, 2000; Smith
& Thelen, 2003). Parents may help in this process by providing a variety of activities and experiences for the child.
Research has found that animals raised in environments with more novel objects and that engage in a variety of
stimulating activities have more brain synapses and larger cerebral cortexes, and they perform better on a variety of
learning tasks compared with animals raised in more impoverished environments (Juraska, Henderson, & Müller,
1984). Similar effects are likely occurring in children who have opportunities to play, explore, and interact with
their environments (Soska, Adolph, & Johnson, 2010).
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 260
Research Focus: Using the Habituation Technique to Study What Infants Know
It may seem to you that babies have little ability to view, hear, understand, or remember the world around
them. Indeed, the famous psychologist William James presumed that the newborn experiences a “blooming,
buzzing confusion” (James, 1890, p. 462). And you may think that, even if babies do know more than
James gave them credit for, it might not be possible to find out what they know. After all, infants can’t
talk or respond to questions, so how would we ever find out? But over the past two decades, developmental
psychologists have created new ways to determine what babies know, and they have found that they know
much more than you, or William James, might have expected.
One way that we can learn about the cognitive development of babies is by measuring their behaviour in
response to the stimuli around them. For instance, some researchers have given babies the chance to control
which shapes they get to see or which sounds they get to hear according to how hard they suck on a pacifier
(Trehub & Rabinovitch, 1972). The sucking behaviour is used as a measure of the infants’ interest in the
stimuli — the sounds or images they suck hardest in response to are the ones we can assume they prefer.
Another approach to understanding cognitive development by observing the behaviour of infants is through
the use of the habituation technique. Habituation refers to the decreased responsiveness toward a stimulus
after it has been presented numerous times in succession. Organisms, including infants, tend to be more
interested in things the first few times they experience them and become less interested in them with more
frequent exposure. Developmental psychologists have used this general principle to help them understand
what babies remember and understand.
In the habituation procedure,1 a baby is placed in a high chair and presented with visual stimuli while a
video camera records the infant’s eye and face movements. When the experiment begins, a stimulus (e.g.,
the face of an adult) appears in the baby’s field of view, and the amount of time the baby looks at the face is
recorded by the camera. Then the stimulus is removed for a few seconds before it appears again and the gaze
is again measured. Over time, the baby starts to habituate to the face, such that each presentation elicits less
gazing at the stimulus. Then a new stimulus (e.g., the face of a different adult or the same face looking in a
different direction) is presented, and the researchers observe whether the gaze time significantly increases.
You can see that if the infant’s gaze time increases when a new stimulus is presented, this indicates that the
baby can differentiate the two stimuli.
Although this procedure is very simple, it allows researchers to create variations that reveal a great deal about
a newborn’s cognitive ability. The trick is simply to change the stimulus in controlled ways to see if the baby
“notices the difference.” Research using the habituation procedure has found that babies can notice changes
in colours, sounds, and even principles of numbers and physics. For instance, in one experiment reported by
Karen Wynn (1995), six-month-old babies were shown a presentation of a puppet that repeatedly jumped up
and down either two or three times, resting for a couple of seconds between sequences (the length of time
and the speed of the jumping were controlled). After the infants habituated to this display, the presentation
was changed such that the puppet jumped a different number of times. As you can see in Figure 7.2, “Can
Infants Do Math?” the infants’ gaze time increased when Wynn changed the presentation, suggesting that
the infants could tell the difference between the number of jumps.
261 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Figure 7.2 Can Infants Do Math? Karen Wynn found that babies that had habituated to a puppet
jumping either two or three times significantly increased their gaze when the puppet began to jump
a different number of times.
Cognitive Development During Childhood
Childhood is a time in which changes occur quickly. The child is growing physically, and cognitive abilities are
also developing. During this time the child learns to actively manipulate and control the environment, and is first
exposed to the requirements of society, particularly the need to control the bladder and bowels. According to Erik
Erikson, the challenges that the child must attain in childhood relate to the development of initiative, competence,
and independence. Children need to learn to explore the world, to become self-reliant, and to make their own way
in the environment.
Figure 7.3 Portrait of Jean Piaget. Jean Piaget developed his theories of
child development by observing the behaviours of children.
These skills do not come overnight. Neurological changes during childhood provide children the ability to do
some things at certain ages, and yet make it impossible for them to do other things. This fact was made apparent
through the groundbreaking work of the Swiss psychologist Jean Piaget (Figure 7.3). During the 1920s, Piaget was
administering intelligence tests to children in an attempt to determine the kinds of logical thinking that children were
capable of. In the process of testing them, Piaget became intrigued, not so much by the answers that the children
got right, but more by the answers they got wrong. Piaget believed that the incorrect answers the children gave were
not mere shots in the dark but rather represented specific ways of thinking unique to the children’s developmental
stage. Just as almost all babies learn to roll over before they learn to sit up by themselves, and learn to crawl before
they learn to walk, Piaget believed that children gain their cognitive ability in a developmental order. These insights
— that children at different ages think in fundamentally different ways — led to Piaget’s stage model of cognitive
development.
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 262
Piaget argued that children do not just passively learn but also actively try to make sense of their worlds. He
argued that, as they learn and mature, children develop schemas — patterns of knowledge in long-term memory —
that help them remember, organize, and respond to information. Furthermore, Piaget thought that when children
experience new things, they attempt to reconcile the new knowledge with existing schemas. Piaget believed that
children use two distinct methods in doing so, methods that he called assimilation and accommodation (see Figure
7.4, “Assimilation and Accommodation”).
Figure 7.4 Assimilation and Accommodation.
When children employ assimilation, they use already developed schemas to understand new information. If
children have learned a schema for horses, then they may call the striped animal they see at the zoo a horse rather
than a zebra. In this case, children fit the existing schema to the new information and label the new information with
the existing knowledge. Accommodation, on the other hand, involves learning new information and thus changing
the schema. When a mother says, “No, honey, that’s a zebra, not a horse,” the child may adapt the schema to fit the
new stimulus, learning that there are different types of four-legged animals, only one of which is a horse.
Piaget’s most important contribution to understanding cognitive development, and the fundamental aspect of his
theory, was the idea that development occurs in unique and distinct stages, with each stage occurring at a specific
time, in a sequential manner, and in a way that allows the child to think about the world using new capacities.
Piaget’s stages of cognitive development are summarized in Table 7.3, “Piaget’s Stages of Cognitive Development.”
263 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Table 7.3 Piaget’s Stages of Cognitive Development.
[Skip Table]
Stage
Approximate
age range Characteristics Stage attainments
Sensorimotor Birth to about
2 years
The child experiences the world through the fundamental senses of
seeing, hearing, touching, and tasting. Object permanence
Preoperational 2 to 7 years
Children acquire the ability to internally represent the world through
language and mental imagery. They also start to see the world from
other people’s perspectives.
Theory of mind;
rapid increase in
language ability
Concrete
operational 7 to 11 years Children become able to think logically. They can increasingly
perform operations on objects that are only imagined. Conservation
Formal
operational
11 years to
adulthood
Adolescents can think systematically, can reason about abstract
concepts, and can understand ethics and scientific reasoning. Abstract logic
The first developmental stage for Piaget was the sensorimotor stage, the cognitive stage that begins at birth and
lasts until around the age of two. It is defined by the direct physical interactions that babies have with the objects
around them. During this stage, babies form their first schemas by using their primary senses—they stare at, listen
to, reach for, hold, shake, and taste the things in their environments.
During the sensorimotor stage, babies’ use of their senses to perceive the world is so central to their understanding
that whenever babies do not directly perceive objects, as far as they are concerned, the objects do not exist. Piaget
found, for instance, that if he first interested babies in a toy and then covered the toy with a blanket, children who
were younger than six months of age would act as if the toy had disappeared completely — they never tried to find
it under the blanket but would nevertheless smile and reach for it when the blanket was removed. Piaget found that
it was not until about eight months that the children realized that the object was merely covered and not gone. Piaget
used the term object permanence to refer to the child’s ability to know that an object exists even when the object
cannot be perceived.
Children younger than about eight months of age do not understand object permanence.
Watch: Object Permanence [YouTube]: http://www.youtube.com/v/
nwXd7WyWNHY
At about two years of age, and until about seven years of age, children move into the
preoperational stage. During this stage, children begin to use language and to think
more abstractly about objects, with capacity to form mental images; however, their
understanding is more intuitive and they lack much ability to deduce or reason. The
thinking is preoperational, meaning that the child lacks the ability to operate on or
transform objects mentally. In one study that showed the extent of this inability, Judy
DeLoache (1987) showed children a room within a small dollhouse. Inside the room, a small toy was visible behind
a small couch. The researchers took the children to another lab room, which was an exact replica of the dollhouse
room, but full-sized. When children who were 2.5 years old were asked to find the toy, they did not know where to
look—they were simply unable to make the transition across the changes in room size. Three-year-old children, on
the other hand, immediately looked for the toy behind the couch, demonstrating that they were improving their
operational skills.
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 264
The inability of young children to view transitions also leads them to be egocentric — unable to readily see and
understand other people’s viewpoints. Developmental psychologists define the theory of mind as the ability to
take another person’s viewpoint, and the ability to do so increases rapidly during the preoperational stage. In one
demonstration of the development of theory of mind, a researcher shows a child a video of another child (let’s call
her Anna) putting a ball in a red box. Then Anna leaves the room, and the video shows that while she is gone, a
researcher moves the ball from the red box into a blue box. As the video continues, Anna comes back into the room.
The child is then asked to point to the box where Anna will probably look to find her ball. Children who are younger
than four years of age typically are unable to understand that Anna does not know that the ball has been moved,
and they predict that she will look for it in the blue box. After four years of age, however, children have developed
a theory of mind — they realize that different people can have different viewpoints and that (although she will be
wrong) Anna will nevertheless think that the ball is still in the red box.
After about seven years of age until 11, the child moves into the concrete operational stage, which is marked
by more frequent and more accurate use of transitions, operations, and abstract concepts, including those of
time, space, and numbers. An important milestone during the concrete operational stage is the development of
conservation — the understanding that changes in the form of an object do not necessarily mean changes in the
quantity of the object. Children younger than seven years generally think that a glass of milk that is tall holds more
milk than a glass of milk that is shorter and wider, and they continue to believe this even when they see the same
milk poured back and forth between the glasses. It appears that these children focus only on one dimension (in this
case, the height of the glass) and ignore the other dimension (width). However, when children reach the concrete
operational stage, their abilities to understand such transformations make them aware that, although the milk looks
different in the different glasses, the amount must be the same.
Children younger than about seven years of age do not understand the principles of conservation.
Watch: “Conservation” [YouTube]: http://www.youtube.com/
watch?v=YtLEWVu815o&feature=youtu.be
At about 11 years of age, children enter the formal operational stage, which is
marked by the ability to think in abstract terms and to use scientific and philosophical
lines of thought. Children in the formal operational stage are better able to
systematically test alternative ideas to determine their influences on outcomes. For
instance, rather than haphazardly changing different aspects of a situation that allows
no clear conclusions to be drawn, they systematically make changes in one thing at a
time and observe what difference that particular change makes. They learn to use
deductive reasoning, such as “if this, then that,” and they become capable of imagining
situations that “might be,” rather than just those that actually exist.
Piaget’s theories have made a substantial and lasting contribution to developmental psychology. His contributions
include the idea that children are not merely passive receptacles of information but rather actively engage in
acquiring new knowledge and making sense of the world around them. This general idea has generated many
other theories of cognitive development, each designed to help us better understand the development of the child’s
information-processing skills (Klahr & MacWhinney, 1998; Shrager & Siegler, 1998). Furthermore, the extensive
research that Piaget’s theory has stimulated has generally supported his beliefs about the order in which cognition
develops. Piaget’s work has also been applied in many domains—for instance, many teachers make use of Piaget’s
stages to develop educational approaches aimed at the level children are developmentally prepared for (Driscoll,
1994; Levin, Siegler, & Druyan, 1990).
Over the years, Piagetian ideas have been refined. For instance, it is now believed that object permanence develops
gradually, rather than more immediately, as a true stage model would predict, and that it can sometimes develop
265 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
much earlier than Piaget expected. Ren.e Baillargeon and her colleagues (Baillargeon, 2004; Wang, Baillargeon,
& Brueckner, 2004) placed babies in a habituation setup, having them watch as an object was placed behind a
screen, entirely hidden from view. The researchers then arranged for the object to reappear from behind another
screen in a different place. Babies who saw this pattern of events looked longer at the display than did babies who
witnessed the same object physically being moved between the screens. These data suggest that the babies were
aware that the object still existed even though it was hidden behind the screen, and thus that they were displaying
object permanence as early as three months of age, rather than the eight months that Piaget predicted.
Another factor that might have surprised Piaget is the extent to which a child’s social surroundings influence
learning. In some cases, children progress to new ways of thinking and retreat to old ones depending on the type of
task they are performing, the circumstances they find themselves in, and the nature of the language used to instruct
them (Courage & Howe, 2002). And children in different cultures show somewhat different patterns of cognitive
development. Dasen (1972) found that children in non-Western cultures moved to the next developmental stage
about a year later than did children from Western cultures, and that level of schooling also influenced cognitive
development. In short, Piaget’s theory probably understated the contribution of environmental factors to social
development.
More recent theories (Cole, 1996; Rogoff, 1990; Tomasello, 1999), based in large part on the sociocultural theory
of the Russian scholar Lev Vygotsky (1962, 1978), argue that cognitive development is not isolated entirely within
the child but occurs at least in part through social interactions. These scholars argue that children’s thinking
develops through constant interactions with more competent others, including parents, peers, and teachers.
An extension of Vygotsky’s sociocultural theory is the idea of community learning, in which children serve as
both teachers and learners. This approach is frequently used in classrooms to improve learning as well as to increase
responsibility and respect for others. When children work cooperatively in groups to learn material, they can help
and support each other’s learning as well as learn about each other as individuals, thereby reducing prejudice
(Aronson, Blaney, Stephan, Sikes, & Snapp, 1978; Brown, 1997).
Social Development During Childhood
It is through the remarkable increases in cognitive ability that children learn to interact with and understand their
environments. But these cognitive skills are only part of the changes that are occurring during childhood. Equally
crucial is the development of the child’s social skills —the ability to understand, predict, and create bonds with the
other people in their environments.
Knowing the Self: The Development of the Self-Concept
One of the important milestones in a child’s social development is learning about his or her own self-existence
(Figure 7.5). This self-awareness is known as consciousness, and the content of consciousness is known as the selfconcept.
The self-concept is a knowledge representation or schema that contains knowledge about us, including
our beliefs about our personality traits, physical characteristics, abilities, values, goals, and roles, as well as the
knowledge that we exist as individuals (Kagan, 1991).
Some animals, including chimpanzees, orangutans, and perhaps dolphins, have at least a primitive sense of self
(Boysen & Himes, 1999). In one study (Gallup, 1970), researchers painted a red dot on the foreheads of anesthetized
chimpanzees and then placed each animal in a cage with a mirror. When the chimps woke up and looked in the
mirror, they touched the dot on their faces, not the dot on the faces in the mirror. These actions suggest that the
chimps understood that they were looking at themselves and not at other animals, and thus we can assume that they
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 266
Figure 7.5 Recognizing Oneself in a Mirror. A simple test of self-awareness is the ability to
recognize oneself in a mirror. Humans and chimpanzees can pass the test; dogs never do.
are able to realize that they exist as individuals. On the other hand, most other animals, including, for instance, dogs,
cats, and monkeys, never realize that it is themselves in the mirror.
Infants who have a similar red dot painted on their foreheads recognize themselves in a mirror in the same way
that the chimps do, and they do this by about 18 months of age (Povinelli, Landau, & Perilloux, 1996). The child’s
knowledge about the self continues to develop as the child grows. By age two, the infant becomes aware of his or
her sex, as a boy or a girl. By age four, self-descriptions are likely to be based on physical features, such as hair
colour and possessions, and by about age six, the child is able to understand basic emotions and the concepts of
traits, being able to make statements such as “I am a nice person” (Harter, 1998).
Soon after children enter school (at about age five or six), they begin to make comparisons with other children, a
process known as social comparison. For example, a child might describe himself as being faster than one boy but
slower than another (Moretti & Higgins, 1990). According to Erikson, the important component of this process is
the development of competence and autonomy — the recognition of one’s own abilities relative to other children.
And children increasingly show awareness of social situations — they understand that other people are looking at
and judging them the same way that they are looking at and judging others (Doherty, 2009).
Successfully Relating to Others: Attachment
One of the most important behaviours a child must learn is how to be accepted by others—the development of close
and meaningful social relationships. The emotional bonds that we develop with those with whom we feel closest, and
particularly the bonds that an infant develops with the mother or primary caregiver, are referred to as attachment
(Cassidy & Shaver, 1999). See examples in Figure 7.6.
Figure 7.6 Children’s Attachment to Caregivers. Children develop appropriate attachment styles
through their interactions with caregivers.
As late as the 1930s, psychologists believed that children who were raised in institutions such as orphanages, and
who received good physical care and proper nourishment, would develop normally, even if they had little interaction
with their caretakers. But studies by the developmental psychologist John Bowlby (1953) and others showed that
these children did not develop normally — they were usually sickly, emotionally slow, and generally unmotivated.
267 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
These observations helped make it clear that normal infant development requires successful attachment with a
caretaker.
In one classic study showing the importance of attachment, Wisconsin University psychologists Harry and Margaret
Harlow investigated the responses of young monkeys, separated from their biological mothers, to two surrogate
mothers introduced to their cages. One — the wire mother — consisted of a round wooden head, a mesh of cold
metal wires, and a bottle of milk from which the baby monkey could drink. The second mother was a foam-rubber
form wrapped in a heated terry-cloth blanket. The Harlows found that although the infant monkeys went to the wire
mother for food, they overwhelmingly preferred and spent significantly more time with the warm terry-cloth mother
that provided no food but did provide comfort (Harlow, 1958).
The studies by the Harlows showed that young monkeys preferred the warm mother that provided a secure base to
the cold mother that provided food.
Watch: “The Harlows’s Monkeys” [YouTube]: http://www.youtube.com/
watch?v=MmbbfisRiwA
The Harlows’s studies confirmed that babies have social as well as physical needs.
Both monkeys and human babies need a secure base that allows them to feel safe.
From this base, they can gain the confidence they need to venture out and explore their
worlds. Erikson (Table 7.1, “Challenges of Development as Proposed by Erik
Erikson”) was in agreement on the importance of a secure base, arguing that the most
important goal of infancy was the development of a basic sense of trust in one’s
caregivers.
Developmental psychologist Mary Ainsworth, a student of John Bowlby, was interested in studying the
development of attachment in infants. Ainsworth created a laboratory test that measured an infant’s attachment to
his or her parent. The test is called the strange situation — a measure of attachment in young children in which
the child’s behaviours are assessed in a situation in which the caregiver and a stranger move in and out of the
environment — because it is conducted in a context that is unfamiliar to the child and therefore likely to heighten
the child’s need for his or her parent (Ainsworth, Blehar, Waters, & Wall, 1978). During the procedure, which lasts
about 20 minutes, the parent and the infant are first left alone, while the infant explores the room full of toys. Then
a strange adult enters the room and talks for a minute to the parent, after which the parent leaves the room. The
stranger stays with the infant for a few minutes, and then the parent again enters and the stranger leaves the room.
During the entire session, a video camera records the child’s behaviours, which are later coded by trained coders.
In the strange situation, children are observed responding to the comings and goings
of parents and unfamiliar adults in their environments.
Watch: “The Strange Situation” [YouTube]: http://www.youtube.com/
watch?v=QTsewNrHUHU
On the basis of their behaviours, the children are categorized into one of four groups,
where each group reflects a different kind of attachment relationship with the
caregiver. A child with a secure attachment style usually explores freely while the
mother is present and engages with the stranger. The child may be upset when the
mother departs but is also happy to see the mother return. A child with an ambivalent (sometimes called insecureresistant)
attachment style is wary about the situation in general, particularly the stranger, and stays close or even
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 268
clings to the mother rather than exploring the toys. When the mother leaves, the child is extremely distressed and
is ambivalent when she returns. The child may rush to the mother but then fail to cling to her when she picks up
the child. A child with an avoidant (sometimes called insecure-avoidant) attachment style will avoid or ignore the
mother, showing little emotion when the mother departs or returns. The child may run away from the mother when
she approaches. The child will not explore very much, regardless of who is there, and the stranger will not be treated
much differently from the mother.
Finally, a child with a disorganized attachment style seems to have no consistent way of coping with the stress of
the strange situation — the child may cry during the separation but avoid the mother when she returns, or the child
may approach the mother but then freeze or fall to the floor. Although some cultural differences in attachment styles
have been found (Rothbaum, Weisz, Pott, Miyake, & Morelli, 2000), research has also found that the proportion
of children who fall into each of the attachment categories is relatively constant across cultures (see Figure 7.7,
“Proportion of Children With Different Attachment Styles”).
Figure 7.7 Proportion of Children With Different Attachment Styles. The graph shows the
approximate proportion of children who have each of the four attachment styles. These
proportions are fairly constant across cultures. [Long Description]
You might wonder whether differences in attachment style are determined more by the child (nature) or more by
the parents (nurture). Most developmental psychologists believe that socialization is primary, arguing that a child
becomes securely attached when the mother is available and able to meet the needs of the child in a responsive and
appropriate manner, but that the insecure styles occur when the mother is insensitive and responds inconsistently to
the child’s needs. In a direct test of this idea, Dutch researcher Dymphna van den Boom (1994) randomly assigned
some babies’ mothers to a training session in which they learned to better respond to their children’s needs. The
research found that these mothers’ babies were more likely to show a secure attachment style compared with the
babies of the mothers in a control group that did not receive training.
269 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
But the attachment behaviour of the child is also likely influenced, at least in part, by temperament, the innate
personality characteristics of the infant. Some children are warm, friendly, and responsive, whereas others tend to
be more irritable, less manageable, and difficult to console. These differences may also play a role in attachment
(Gillath, Shaver, Baek, & Chun, 2008; Seifer, Schiller, Sameroff, Resnick, & Riordan, 1996). Taken together, it
seems safe to say that attachment, like most other developmental processes, is affected by an interplay of genetic
and socialization influences.
Research Focus: Using a Longitudinal Research Design to Assess the Stability of Attachment
You might wonder whether the attachment style displayed by infants has much influence later in life. In
fact, research has found that the attachment styles of children predict their emotions and their behaviours
many years later (Cassidy & Shaver, 1999). Psychologists have studied the persistence of attachment styles
over time using longitudinal research designs — research designs in which individuals in the sample are
followed and contacted over an extended period of time, often over multiple developmental stages.
In one such study, Waters, Merrick, Treboux, Crowell, and Albersheim (2000) examined the extent of
stability and change in attachment patterns from infancy to early adulthood. In their research, 60 middle-class
infants who had been tested in the strange situation at one year of age were recontacted 20 years later and
interviewed using a measure of adult attachment. Waters and colleagues found that 72% of the participants
received the same secure versus insecure attachment classification in early adulthood as they had received as
infants. The adults who changed categorization (usually from secure to insecure) were primarily those who
had experienced traumatic events, such as the death or divorce of parents, severe illnesses (contracted by the
parents or the children themselves), or physical or sexual abuse by a family member.
In addition to finding that people generally display the same attachment style over time, longitudinal studies
have also found that the attachment classification received in infancy (as assessed using the strange situation
or other measures) predicts many childhood and adult behaviours. Securely attached infants have closer,
more harmonious relationships with peers, are less anxious and aggressive, and are better able to understand
others’ emotions than are those who were categorized as insecure as infants (Lucas-Thompson & Clarke-
Stewart, 2007). And securely attached adolescents also have more positive peer and romantic relationships
than their less securely attached counterparts (Carlson, Sroufe, & Egeland, 2004).
Conducting longitudinal research is a very difficult task, but one that has substantial rewards. When the
sample is large enough and the time frame long enough, the potential findings of such a study can provide
rich and important information about how people change over time and the causes of those changes. The
drawbacks of longitudinal studies include the cost and the difficulty of finding a large sample that can be
tracked accurately over time, and the time (many years) that it takes to get the data. In addition, because the
results are delayed over an extended period, the research questions posed at the beginning of the study may
become less relevant over time as the research continues.
Cross-sectional research designs represent an alternative to longitudinal designs. In a cross-sectional
research design, age comparisons are made between samples of different people at different ages at one
time. In one example, Jang, Livesley, and Vernon (1996) studied two groups of identical and nonidentical
(fraternal) twins, one group in their 20s and the other group in their 50s, to determine the influence of
genetics on personality. They found that genetics played a more significant role in the older group of twins,
suggesting that genetics became more significant for personality in later adulthood.
Cross-sectional studies have a major advantage in that the scientist does not have to wait for years to pass
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 270
to get results. On the other hand, the interpretation of the results in a cross-sectional study is not as clear
as those from a longitudinal study, in which the same individuals are studied over time. Most important,
the interpretations drawn from cross-sectional studies may be confounded by cohort effects. Cohort effects
refer to the possibility that differences in cognition or behaviour at two points in time may be caused by
differences that are unrelated to the changes in age. The differences might instead be due to environmental
factors that affect an entire age group. For instance, in the study by Jang, Livesley, and Vernon (1996) that
compared younger and older twins, cohort effects might be a problem. The two groups of adults necessarily
grew up in different time periods, and they may have been differentially influenced by societal experiences,
such as economic hardship, the presence of wars, or the introduction of new technology. As a result, it is
difficult in cross-sectional studies such as this one to determine whether the differences between the groups
(e.g., in terms of the relative roles of environment and genetics) are due to age or to other factors.
Key Takeaways
• Babies are born with a variety of skills and abilities that contribute to their survival, and they also
actively learn by engaging with their environments.
• The habituation technique is used to demonstrate the newborn’s ability to remember and learn
from experience.
• Children use both assimilation and accommodation to develop functioning schemas of the world.
• Piaget’s theory of cognitive development proposes that children develop in a specific series of
sequential stages: sensorimotor, preoperational, concrete operational, and formal operational.
• Piaget’s theories have had a major impact, but they have also been critiqued and expanded.
• Social development requires the development of a secure base from which children feel free to
explore. Attachment styles refer to the security of this base and more generally to the type of
relationship that people, and especially children, develop with those who are important to them.
• Longitudinal and cross-sectional studies are each used to test hypotheses about development, and
each approach has advantages and disadvantages.
Exercises and Critical Thinking
1. Give an example of a situation in which you or someone else might show cognitive assimilation
and cognitive accommodation. In what cases do you think each process is most likely to occur?
2. Consider some examples of how Piaget’s and Vygotsky’s theories of cognitive development
might be used by teachers who are teaching young children.
271 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
3. Consider the attachment styles of some of your friends in terms of their relationships with their
parents and other friends. Do you think their style is secure?
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4, 172–176.
Image Attributions
Figure 7.2: Adapted from Wynn (1995).
Figure 7.3: Jean Piaget by Anton Johansson, http://www.flickr.com/photos/mirjoran/455878802 used under CC BY
2.0 license (https://creativecommons.org/licenses/by/2.0/).
Figure 7.5: “Toddler in mirror” by Samantha Steele (http://www.flickr.com/photos/samanthasteele/3983047059/)
is licensed under CC BY-NC-ND 2.0 license (http://creativecommons.org/licenses/by-nc-nd/2.0/deed.en_CA).
7.2 INFANCY AND CHILDHOOD: EXPLORING AND LEARNING • 274
There’s a monkey in my mirror” by Mor (http://www.flickr.com/photos/mmoorr/1921632741/) is licensed under
CC BY-NC 2.0 license (http://creativecommons.org/licenses/by-nc/2.0/deed.en_CA). “mirror mirror who is the
most beautiful dog?” by rromer (http://www.flickr.com/photos/rromer/6309501395/) is licensed under CC BY-NCSA
2.0 license (http://creativecommons.org/licenses/by-nc-sa/2.0/deed.en_CA).
Figure 7.6: Source: “Maternal Bond” by Koivth (http://en.wikipedia.org/wiki/File:MaternalBond.jpg) is licensed
under the Creative Commons Attribution-Share Alike 3.0 Unported (http://creativecommons.org/licenses/by-sa/3.0/
deed.en_CA). “An admirable dad” by Julien Harneis (http://www.flickr.com/photos/julien_harneis/6342076964/
in/photostream/) is licensed under CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0/deed.en_CA).
“Szymon i Krystian” by Joymaster (http://en.wikipedia.org/wiki/File:Szymon_i_Krystian_003.JPG) is licensed
under the Creative Commons Attribution-Share Alike 3.0 (http://creativecommons.org/licenses/by-sa/3.0/
deed.en_CA).
Long Descriptions:
Figure 7.7 long description: Childrens’ Attachment Styles. 60% are secure. 15% are disorganized. 15% are
avoidant. 10% are ambivalent. [Return to Figure 7.7]
Notes
1. A procedure that uses the principles of habituation to allow researchers to infer the cognitive processes of newborns.
275 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
7.3 Adolescence: Developing Independence and Identity
Learning Objectives
1. Summarize the physical and cognitive changes that occur for boys and girls during
adolescence.
2. Explain how adolescents develop a sense of morality and of self-identity.
Adolescence is defined as the years between the onset of puberty and the beginning of adulthood. In the past, when
people were likely to marry in their early 20s or younger, this period might have lasted only 10 years or less —
starting roughly between ages 12 and 13 and ending by age 20, at which time the child got a job or went to work on
the family farm, married, and started his or her own family. Today, children mature more slowly, move away from
home at later ages, and maintain ties with their parents longer. For instance, children may go away to university but
still receive financial support from parents, and they may come home on weekends or even to live for extended time
periods. Thus the period between puberty and adulthood may well last into the late 20s, merging into adulthood
itself. In fact, it is appropriate now to consider the period of adolescence and that of emerging adulthood (the ages
between 18 and the middle or late 20s) together.
During adolescence, the child continues to grow physically, cognitively, and emotionally, changing from a child
into an adult. The body grows rapidly in size, and the sexual and reproductive organs become fully functional. At
the same time, as adolescents develop more advanced patterns of reasoning and a stronger sense of self, they seek
to forge their own identities, developing important attachments with people other than their parents. Particularly
in Western societies, where the need to forge a new independence is critical (Baumeister & Tice, 1986; Twenge,
2006), this period can be stressful for many children, as it involves new emotions, the need to develop new social
relationships, and an increasing sense of responsibility and independence.
Although adolescence can be a time of stress for many teenagers, most of them weather the trials and tribulations
successfully. For example, the majority of adolescents experiment with alcohol sometime before high school
graduation. Although many will have been drunk at least once, relatively few teenagers will develop long-lasting
drinking problems or permit alcohol to adversely affect their school or personal relationships. Similarly, a great
many teenagers break the law during adolescence, but very few young people develop criminal careers (Farrington,
1995). These facts do not, however, mean that using drugs or alcohol is a good idea. The use of recreational drugs
can have substantial negative consequences, and the likelihood of these problems (including dependence, addiction,
and even brain damage) is significantly greater for young adults who begin using drugs at an early age.
Physical Changes in Adolescence
Adolescence begins with the onset of puberty, a developmental period in which hormonal changes cause rapid
physical alterations in the body, culminating in sexual maturity. Although the timing varies to some degree across
276
cultures, the average age range for reaching puberty is between nine and 14 years for girls and between 10 and 17
years for boys (Marshall & Tanner, 1986).
Puberty begins when the pituitary gland begins to stimulate the production of the male sex hormone testosterone in
boys and the female sex hormones estrogen and progesterone in girls. The release of these sex hormones triggers
the development of the primary sex characteristics, the sex organs concerned with reproduction (Figure 7.8, “Sex
Characteristics”). These changes include the enlargement of the testicles and the penis in boys and the development
of the ovaries, uterus, and vagina in girls. In addition, secondary sex characteristics (features that distinguish
the two sexes from each other but are not involved in reproduction) are also developing, such as an enlarged
Adam’s apple, a deeper voice, and pubic and underarm hair in boys, and enlargement of the breasts and hips and
the appearance of pubic and underarm hair in girls (Figure 7.8, “Sex Characteristics”). The enlargement of breasts
is usually the first sign of puberty in girls and, on average, occurs between ages 10 and 12 (Marshall & Tanner,
1986). Boys typically begin to grow facial hair between ages 14 and 16, and both boys and girls experience a rapid
growth spurt during this stage. The growth spurt for girls usually occurs earlier than that for boys, with some boys
continuing to grow into their 20s.
Figure 7.8 Sex Characteristics. Puberty brings dramatic changes in the body, including the
development of primary and secondary sex characteristics.
A major milestone in puberty for girls is menarche, the first menstrual period, typically experienced at around 12
or 13 years of age (Anderson, Dannal, & Must, 2003). The age of menarche varies substantially and is determined
by genetics, as well as by diet and lifestyle, since a certain amount of body fat is needed to attain menarche. Girls
who are very slim, who engage in strenuous athletic activities, or who are malnourished may begin to menstruate
later. Even after menstruation begins, girls whose level of body fat drops below the critical level may stop having
their periods. The sequence of events for puberty is more predictable than the age at which they occur. Some girls
may begin to grow pubic hair at age 10 but not attain menarche until age 15. In boys, facial hair may not appear
until 10 years after the initial onset of puberty.
The timing of puberty in both boys and girls can have significant psychological consequences. Boys who mature
earlier attain some social advantages because they are taller and stronger and, therefore, often more popular (Lynne,
277 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Graber, Nichols, Brooks-Gunn, & Botvin, 2007). At the same time, however, early-maturing boys are at greater risk
for delinquency and are more likely than their peers to engage in antisocial behaviours, including drug and alcohol
use, truancy, and precocious sexual activity. Girls who mature early may find their maturity stressful, particularly
if they experience teasing or sexual harassment (Mendle, Turkheimer, & Emery, 2007; Pescovitz & Walvoord,
2007). Early-maturing girls are also more likely to have emotional problems, a lower self-image, and higher rates
of depression, anxiety, and disordered eating than their peers (Ge, Conger, & Elder, 1996).
Cognitive Development in Adolescence
Although the most rapid cognitive changes occur during childhood, the brain continues to develop throughout
adolescence, and even into the 20s (Weinberger, Elvev.g, & Giedd, 2005). During adolescence, the brain continues
to form new neural connections, but also casts off unused neurons and connections (Blakemore, 2008). As teenagers
mature, the prefrontal cortex, the area of the brain responsible for reasoning, planning, and problem solving, also
continues to develop (Goldberg, 2001). And myelin, the fatty tissue that forms around axons and neurons and helps
speed transmissions between different regions of the brain, also continues to grow (Rapoport et al., 1999).
Adolescents often seem to act impulsively, rather than thoughtfully, and this may be in part because the
development of the prefrontal cortex is, in general, slower than the development of the emotional parts of the brain,
including the limbic system (Blakemore, 2008). Furthermore, the hormonal surge that is associated with puberty,
which primarily influences emotional responses, may create strong emotions and lead to impulsive behaviour. It has
been hypothesized that adolescents may engage in risky behaviour, such as smoking, drug use, dangerous driving,
and unprotected sex, in part because they have not yet fully acquired the mental ability to curb impulsive behaviour
or to make entirely rational judgments (Steinberg, 2007).
The new cognitive abilities that are attained during adolescence may also give rise to new feelings of egocentrism,
in which adolescents believe that they can do anything and that they know better than anyone else, including their
parents (Elkind, 1978). Teenagers are likely to be highly self-conscious, often creating an imaginary audience in
which they feel that everyone is constantly watching them (Goossens, Beyers, Emmen, & van Aken, 2002). Because
teens think so much about themselves, they mistakenly believe that others must be thinking about them, too (Rycek,
Stuhr, McDermott, Benker, & Swartz, 1998). It is no wonder that everything a teen’s parents do suddenly feels
embarrassing to them when they are in public.
Social Development in Adolescence
Some of the most important changes that occur during adolescence involve the further development of the selfconcept
and the development of new attachments. Whereas young children are most strongly attached to their
parents, the important attachments of adolescents move increasingly away from parents and increasingly toward
peers (Harris, 1998). As a result, parents’ influence diminishes at this stage.
According to Erikson (Table 7.1, “Challenges of Development as Proposed by Erik Erikson”), the main social task
of the adolescent is the search for a unique identity — the ability to answer the question “Who am I?” In the
search for identity, the adolescent may experience role confusion in which he or she is balancing or choosing among
identities, taking on negative or undesirable identities, or temporarily giving up looking for an identity altogether if
things are not going well.
One approach to assessing identity development was proposed by James Marcia (1980). In his approach,
adolescents are asked questions regarding their exploration of and commitment to issues related to occupation,
politics, religion, and sexual behaviour. The responses to the questions allow the researchers to classify the
adolescent into one of four identity categories (see Table 7.4, “James Marcia’s Stages of Identity Development”).
7.3 ADOLESCENCE: DEVELOPING INDEPENDENCE AND IDENTITY • 278
Table 7.4 James Marcia’s Stages of Identity Development. Adapted from Marcia (1980).</caption
[Skip Table]
Identity-diffusion
status
The individual does not have firm commitments regarding the issues in question and is not making
progress toward them.
Foreclosure status The individual has not engaged in any identity experimentation and has established an identity based
on the choices or values of others.
Moratorium status The individual is exploring various choices but has not yet made a clear commitment to any of them.
Identityachievement
status The individual has attained a coherent and committed identity based on personal decisions.
Studies assessing how teens pass through Marcia’s stages show that, although most teens eventually succeed in
developing a stable identity, the path to it is not always easy and there are many routes that can be taken. Some
teens may simply adopt the beliefs of their parents or the first role that is offered to them, perhaps at the expense
of searching for other, more promising possibilities (foreclosure status). Other teens may spend years trying on
different possible identities (moratorium status) before finally choosing one.
To help them work through the process of developing an identity, teenagers may well try out different identities in
different social situations. They may maintain one identity at home and a different type of persona when they are
with their peers. Eventually, most teenagers do integrate the different possibilities into a single self-concept and a
comfortable sense of identity (identity-achievement status).
For teenagers, the peer group provides valuable information about the self-concept. For instance, in response to the
question “What were you like as a teenager? (e.g., cool, nerdy, awkward?),” posed on the website Answerbag, one
teenager replied in this way:
I’m still a teenager now, but from 8th-9th grade I didn’t really know what I wanted at
all. I was smart, so I hung out with the nerdy kids. I still do; my friends mean the world
to me. But in the middle of 8th I started hanging out with whom you may call the “cool”
kids…and I also hung out with some stoners, just for variety. I pierced various parts of
my body and kept my grades up. Now, I’m just trying to find who I am. I’m even doing
my sophomore year in China so I can get a better view of what I want. (Answerbag,
2007)
Responses like this one demonstrate the extent to which adolescents are developing their self-concepts and selfidentities
and how they rely on peers to help them do that. The writer here is trying out several (perhaps conflicting)
identities, and the identities any teen experiments with are defined by the group the person chooses to be a part
of. The friendship groups (cliques, crowds, or gangs) that are such an important part of the adolescent experience
allow the young adult to try out different identities, and these groups provide a sense of belonging and acceptance
(Rubin, Bukowski, & Parker, 2006). A big part of what the adolescent is learning is social identity, the part of the
self-concept that is derived from one’s group memberships. Adolescents define their social identities according to
how they are similar to and differ from others, finding meaning in the sports, religious, school, gender, and ethnic
categories they belong to.
279 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Developing Moral Reasoning: Kohlberg’s Theory
The independence that comes with adolescence requires independent thinking as well as the development of
morality — standards of behaviour that are generally agreed on within a culture to be right or proper. Just as
Piaget believed that children’s cognitive development follows specific patterns, Lawrence Kohlberg (1984) argued
that children learn their moral values through active thinking and reasoning, and that moral development follows a
series of stages. To study moral development, Kohlberg posed moral dilemmas to children, teenagers, and adults,
such as the following:
In Europe, a woman was near death from a special kind of cancer. There was one drug that the doctors thought
might save her. It was a form of radium that a druggist in the same town had recently discovered. The drug was
expensive to make, but the druggist was charging 10 times what the drug cost him to make. He paid $400 for the
radium and charged $4,000 for a small dose of the drug. The sick woman’s husband, Heinz, went to everyone he
knew to borrow the money and tried every legal means, but he could only get together about $2,000, which is half
of what it cost. He told the druggist that his wife was dying and asked him to sell it cheaper or let him pay later. But
the druggist said, “No, I discovered the drug and I’m going to make money from it.” So, having tried every legal
means, Heinz gets desperate and considers breaking into the man’s store to steal the drug for his wife.
1. Should Heinz steal the drug? Why or why not?
2. Is it actually right or wrong for him to steal the drug? Why is it right or wrong?
3. Does Heinz have a duty or obligation to steal the drug? Why or why not? (Kohlberg, 1984)
Watch: People Being Interviewed About Kohlberg’s Stages [YouTube]: http://www.youtube.com/v/
zY4etXWYS84
As you can see in Table 7.5, “Lawrence Kohlberg’s Stages of Moral Reasoning,” Kohlberg concluded, on the basis
of their responses to the moral questions, that, as children develop intellectually, they pass through three stages of
moral thinking: the preconventional level, the conventional level, and the postconventional level.
Table 7.5 Lawrence Kohlberg’s Stages of Moral Reasoning.
[Skip Table]
Age Moral Stage Description
Young
children
Preconventional
morality
Until about the age of nine, children focus on self-interest. At this stage, punishment is
avoided and rewards are sought. A person at this level will argue, “The man shouldn’t steal
the drug, as he may get caught and go to jail.”
Older
children,
adolescents,
most adults
Conventional
morality
By early adolescence, the child begins to care about how situational outcomes impact
others and wants to please and be accepted. At this developmental phase, people are able to
value the good that can be derived from holding to social norms in the form of laws or less
formalized rules. For example, a person at this level may say, “He should not steal the drug,
as everyone will see him as a thief, and his wife, who needs the drug, wouldn’t want to be
cured because of thievery,” or, “No matter what, he should obey the law because stealing is
a crime.”
Many
adults
Postconventional
morality
At this stage, individuals employ abstract reasoning to justify behaviours. Moral behaviour
is based on self-chosen ethical principles that are generally comprehensive and universal,
such as justice, dignity, and equality. Someone with self-chosen principles may say, “The
man should steal the drug to cure his wife and then tell the authorities that he has done so.
He may have to pay a penalty, but at least he has saved a human life.”
7.3 ADOLESCENCE: DEVELOPING INDEPENDENCE AND IDENTITY • 280
Although research has supported Kohlberg’s idea that moral reasoning changes from an early emphasis on
punishment and social rules and regulations to an emphasis on more general ethical principles, as with Piaget’s
approach, Kohlberg’s stage model is probably too simple. For one, children may use higher levels of reasoning for
some types of problems, but revert to lower levels in situations where doing so is more consistent with their goals or
beliefs (Rest, 1979). Second, it has been argued that the stage model is particularly appropriate for Western, rather
than non-Western, samples in which allegiance to social norms (such as respect for authority) may be particularly
important (Haidt, 2001). And there is frequently little correlation between how children score on the moral stages
and how they behave in real life.
Perhaps the most important critique of Kohlberg’s theory is that it may describe the moral development of
boys better than it describes that of girls. Carol Gilligan (1982) has argued that, because of differences in their
socialization, males tend to value principles of justice and rights, whereas females value caring for and helping
others. Although there is little evidence that boys and girls score differently on Kohlberg’s stages of moral
development (Turiel, 1998), it is true that girls and women tend to focus more on issues of caring, helping, and
connecting with others than do boys and men (Jaffee & Hyde, 2000). If you don’t believe this, ask yourself when
you last got a thank-you note from a man.
Key Takeaways
• Adolescence is the period of time between the onset of puberty and emerging adulthood.
• Emerging adulthood is the period from age 18 years until the mid-20s in which young people
begin to form bonds outside the family, attend university, and find work. Even so, they tend not to
be fully independent and have not taken on all the responsibilities of adulthood. This stage is most
prevalent in Western cultures.
• Puberty is a developmental period in which hormonal changes cause rapid physical alterations in
the body.
• The cerebral cortex continues to develop during adolescence and early adulthood, enabling
improved reasoning, judgment, impulse control, and long-term planning.
• A defining aspect of adolescence is the development of a consistent and committed self-identity.
The process of developing an identity can take time but most adolescents succeed in developing a
stable identity.
• Kohlberg’s theory proposes that moral reasoning is divided into the following stages:
preconventional morality, conventional morality, and postconventional morality.
• Kohlberg’s theory of morality has been expanded and challenged, particularly by Gilligan, who
has focused on differences in morality between boys and girls.
Exercises and Critical Thinking
1. Based on what you learned in this chapter, do you think that people should be allowed to drive
281 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
at age 16? Why or why not? At what age do you think they should be allowed to vote and to drink
alcohol?
2. Think about your experiences in high school. What sort of cliques or crowds were there? How
did people express their identities in these groups? How did you use your groups to define
yourself and develop your own identity?
References
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283 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
7.4 Early and Middle Adulthood: Building Effective Lives
Learning Objective
1. Review the physical and cognitive changes that accompany early and middle adulthood.
Until the 1970s, psychologists tended to treat adulthood as a single developmental stage, with few or no distinctions
made between the various periods that we pass through between adolescence and death. Present-day psychologists
realize, however, that physical, cognitive, and emotional responses continue to develop throughout life, with
corresponding changes in our social needs and desires. Thus the three stages of early adulthood, middle adulthood,
and late adulthood each have their own physical, cognitive, and social challenges.
In this section, we will consider the development of our cognitive and physical aspects that occur during early
adulthood and middle adulthood — roughly the ages between 25 and 45 and between 45 and 65, respectively.
These stages represent a long period of time — longer, in fact, than any of the other developmental stages — and
the bulk of our lives is spent in them. These are also the periods in which most of us make our most substantial
contributions to society, by meeting two of Erik Erikson’s life challenges: we learn to give and receive love in a
close, long-term relationship, and we develop an interest in guiding the development of the next generation, often
by becoming parents.
Psychology in Everyday Life: What Makes a Good Parent?
One thing that you may have wondered about as you grew up, and which you may start to think about again
if you decide to have children yourself, concerns the skills involved in parenting. Some parents are strict,
others are lax; some parents spend a lot of time with their kids, trying to resolve their problems and helping
to keep them out of dangerous situations, whereas others leave their children with nannies or in day care.
Some parents hug and kiss their kids and say that they love them over and over every day, whereas others
never do. Do these behaviours matter? And what makes a “good parent”?
We have already considered two answers to this question, in the form of what all children require: (a) babies
need a conscientious mother who does not smoke, drink, or use drugs during her pregnancy, and (b) infants
need caretakers who are consistently available, loving, and supportive to help them form a secure base. One
case in which these basic goals are less likely to be met is when the mother is an adolescent. Adolescent
mothers are more likely to use drugs and alcohol during their pregnancies, to have poor parenting skills in
general, and to provide insufficient support for the child (Ek.us, Christensson, & Hjern, 2004). As a result,
the babies of adolescent mothers have higher rates of academic failure, delinquency, and incarceration in
comparison to children of older mothers (Moore & Brooks-Gunn, 2002).
Normally, it is the mother who provides early attachment, but fathers are not irrelevant. In fact, studies have
284
found that children whose fathers are more involved tend to be more cognitively and socially competent,
more empathetic, and psychologically better adjusted, compared with children whose fathers are less
involved (Rohner & Veneziano, 2001). In fact, Amato (1994) found that, in some cases, the role of the father
can be as important as, or even more important than, that of the mother in the child’s overall psychological
health and well-being. Amato concluded, “Regardless of the quality of the mother-child relationship, the
closer adult offspring were to their fathers, the happier, more satisfied, and less distressed they reported
being” (p. 1039).
As the child grows, parents take on one of four types of parenting styles — parental behaviours that
determine the nature of parent-child interactions and that guide their interaction with the child. These styles
depend on whether the parent is more or less demanding and more or less responsive to the child (see Figure
7.9, “Parenting Styles”). Authoritarian parents are demanding but not responsive. They impose rules and
expect obedience, tending to give orders (“Eat your food!”) and enforcing their commands with rewards
and punishment, without providing any explanation of where the rules came from except “Because I said
so!” Permissive parents, on the other hand, tend to make few demands and give little punishment, but they
are responsive in the sense that they generally allow their children to make their own rules. Authoritative
parents are demanding (“You must be home by curfew”), but they are also responsive to the needs and
opinions of the child (“Let’s discuss what an appropriate curfew might be”). They set rules and enforce them,
but they also explain and discuss the reasons behind the rules. Finally, rejecting-neglecting parents are
undemanding and unresponsive overall.
Figure 7.9 Parenting Styles. Parenting styles can be divided into four types, based on the
combination of demandingness and responsiveness. The authoritative style, characterized by both
responsiveness and also demandingness, is the most effective. [Long Description]
Many studies of children and their parents, using different methods, measures, and samples, have reached the
same conclusion—namely, that authoritative parenting, in comparison to the other three styles, is associated
285 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
with a wide range of psychological and social advantages for children. Parents who use the authoritative
style, with its combination of demands on the children as well as responsiveness to the children’s needs, have
kids who show better psychological adjustment, school performance, and psychosocial maturity compared
with the kids of parents who use the other styles (Baumrind, 1996; Grolnick & Ryan, 1989).
On the other hand, there are cultural differences in parenting styles. In a study comparing parenting styles
in Canada, France, and Italy, Michael Claes and colleagues at the University of Montreal found Canadian
parents to be the most tolerant, having fewer rules and disciplinary actions. Canadian mothers and fathers
were seen as less punitive, less coercive, and more tolerant than French and Italian mothers. The French were
found to parent in a moderate style. French fathers, however, were perceived by teens as emotionally distant,
rigid, and prone to intergenerational conflict. French mothers, for their part, were reported to foster closer
bonds as their children grew into adolescence (Claes et al., 2011).
In all three countries, teens experienced a gradual decrease in behavioural control between the ages of 11
and 19: fathers and mothers reduced requirements and disciplinary constraints. “Our study found parental
control is dictated by social codes and culture-specific values, which promote certain parental practices
and proscribe others,” says Dr. Claes, noting that Canadian parents value a democratic conception of
education that promotes independence and negotiation, while European parents, especially Italians, advocate
for obligations and respect for parental authority (Science Daily, 2010).
Despite the fact that different parenting styles are differentially effective overall, every child is different
and parents must be adaptable. Some children have particularly difficult temperaments, and these children
require more parenting. Because these difficult children demand more parenting, the behaviours of the
parents matter more for the children’s development than they do for other, less demanding children who
require less parenting overall (Pluess & Belsky, 2010). These findings remind us how the behaviour of the
child can influence the behaviour of the people in his or her environment.
Although the focus is on the child, the parents must never forget about each other. Parenting is timeconsuming
and emotionally taxing, and the parents must work together to create a relationship in which
both mother and father contribute to the household tasks and support each other. It is also important for the
parents to invest time in their own intimacy, as happy parents are more likely to stay together, and divorce
has a profoundly negative impact on children, particularly during and immediately after the divorce (Burt,
Barnes, McGue, & Iacono, 2008; Ge, Natsuaki, & Conger, 2006).
Physical and Cognitive Changes in Early and Middle Adulthood
Compared with the other stages, the physical and cognitive changes that occur in the stages of early and middle
adulthood are less dramatic. As individuals pass into their 30s and 40s, their recovery from muscular strain becomes
more prolonged, and their sensory abilities may become somewhat diminished, at least when compared with their
prime years, during the teens and early 20s (Panno, 2004). Visual acuity diminishes somewhat, and many people
in their late 30s and early 40s begin to notice that their eyes are changing and they need eyeglasses. Adults in
their 30s and 40s may also begin to suffer some hearing loss because of damage to the hair cells (cilia) in the
inner ear (Lacher-Foug.re & Demany, 2005). And it is during middle adulthood that many people first begin
to suffer from ailments such as high cholesterol and high blood pressure as well as low bone density (Shelton,
2006). Corresponding to changes in our physical abilities, our cognitive and sensory abilities also seem to show
some, but not dramatic, decline during this stage.
7.4 EARLY AND MIDDLE ADULTHOOD: BUILDING EFFECTIVE LIVES • 286
Menopause
The stages of both early and middle adulthood bring about a gradual decline in fertility, particularly for women.
Eventually, women experience menopause, the cessation of the menstrual cycle, which usually occurs at around
age 50. Menopause occurs because of the gradual decrease in the production of the female sex hormones estrogen
and progesterone, which slows the production and release of eggs into the uterus. Women whose menstrual cycles
have stopped for 12 consecutive months are considered to have entered menopause (Minkin & Wright, 2004).
Researchers have found that women’s responses to menopause are social as well as physical, and that they vary
substantially between both individuals and cultures. Within individuals, some women may react more negatively to
menopause, worrying that they have lost their femininity and that their final chance to bear children is over, whereas
other women may regard menopause more positively, focusing on the new freedom from menstrual discomfort and
unwanted pregnancy. In Western cultures such as in Canada, women are likely to see menopause as a challenging
and potentially negative event, whereas in India, where older women enjoy more social privileges than do younger
ones, menopause is more positively regarded (Avis & Crawford, 2008).
Menopause may have evolutionary benefits. Infants have better chances of survival when their mothers are younger
and have more energy to care for them, and the presence of older women who do not have children of their own
to care for (but who can help out with raising grandchildren) can be beneficial to the family group. Also consistent
with the idea of an evolutionary benefit of menopause is that the decline in fertility occurs primarily for women,
who do most of the child care and who need the energy of youth to accomplish it. If older women were able to have
children, they might not be as able to effectively care for them. Most men never completely lose their fertility, but
they do experience a gradual decrease in testosterone levels, sperm count, and speed of erection and ejaculation.
Social Changes in Early and Middle Adulthood
Perhaps the major marker of adulthood is the ability to create an effective and independent life. Whereas children
and adolescents are generally supported by parents, adults must make their own living and must start their own
families. Furthermore, the needs of adults are different from those of younger persons.
Even though the timing of the major life events that occur in early and middle adulthood varies substantially among
individuals, the events nevertheless tend to follow a general sequence, known as a social clock. The social clock
refers to the culturally preferred “right time” for major life events, such as moving out of the childhood house,
getting married, and having children. People who do not appear to be following the social clock (e.g., young adults
who still live with their parents, individuals who never marry, and couples who choose not to have children) may
be seen as unusual or deviant, and they may be stigmatized by others (DePaulo, 2006; Rook, Catalano, & Dooley,
1989).
Although they are doing it later, on average, than they did even 20 or 30 years ago, most people do eventually marry.
Marriage is beneficial to the partners, both in terms of mental health and physical health. People who are married
report greater life satisfaction than those who are not married and also suffer fewer health problems (Gallagher &
Waite, 2001; Liu & Umberson, 2008).
Divorce is more common now than it was 50 years ago. Fluctuating between 35% and 42%, the proportion of
marriages projected to end in divorce has remained relatively stable during the last 20 years in Canada. In 2008,
40.7% of marriages were projected to end in divorce before the 30th wedding anniversary (Statistics Canada, 2011),
although about three-quarters of people who divorce will remarry. Most divorces occur for couples in their 20s,
because younger people are frequently not mature enough to make good marriage choices or to make marriages last.
287 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
Marriages are more successful for older adults and for those with more education (Goodwin, Mosher, & Chandra,
2010).
Parenthood also involves a major and long-lasting commitment, and one that can cause substantial stress on the
parents. The time and finances invested in children create stress, which frequently results in decreased marital
satisfaction (Twenge, Campbell, & Foster, 2003). This decline is especially true for women, who bear the larger
part of the burden of raising the children and taking care of the house, despite the fact they increasingly also work
and have careers.
Despite the challenges of early and middle adulthood, the majority of middle-aged adults are not unhappy. These
years are often very satisfying, as families have been established, careers have been entered into, and some
percentage of life goals has been realized (Eid & Larsen, 2008).
Key Takeaways
• It is in early and middle adulthood that muscle strength, reaction time, cardiac output, and sensory
abilities begin to decline.
• One of the key signs of aging in women is the decline in fertility, culminating in menopause,
which is marked by the cessation of the menstrual period.
• The different social stages in adulthood, such as marriage, parenthood, and work, are loosely
determined by a social clock, a culturally recognized time for each phase.
Exercises and Critical Thinking
1. Compare your behaviour, values, and attitudes regarding marriage and work to the attitudes of
your parents and grandparents. In what way are your values similar? In what ways are they
different?
2. Draw a timeline of your own planned or preferred social clock. What factors do you think will
make it more or less likely that you will be able to follow the timeline?
References
Amato, P. R. (1994). Father-child relations, mother-child relations, and offspring psychological well-being in
adulthood. Journal of Marriage and the Family, 56, 1031–1042.
Avis, N. E., & Crawford, S. (2008). Cultural differences in symptoms and attitudes toward menopause. Menopause
Management, 17(3), 8–13.
Baumrind, D. (1996). The discipline controversy revisited. Family Relations, 45(4), 405–414.
7.4 EARLY AND MIDDLE ADULTHOOD: BUILDING EFFECTIVE LIVES • 288
Burt, S. A., Barnes, A. R., McGue, M., & Iacono, W. G. (2008). Parental divorce and adolescent delinquency:
Ruling out the impact of common genes. Developmental Psychology, 44(6), 1668–1677.
Claes, M., Perchecb, C., Mirandac, D., Benoita, A., Bariaudb, F., Lanzd, M., Martad, E., & Lacoursea, ..
(2011). Adolescents’ perceptions of parental practices: A cross-national comparison of Canada, France, and Italy.
Journal of Adolescence, 34 (2), 225–238.
DePaulo, B. M. (2006). Singled out: How singles are stereotyped, stigmatized and ignored, and still live happily
ever after. New York, NY: St. Martin’s Press.
Eid, M., & Larsen, R. J. (Eds.). (2008). The science of subjective well-being. New York, NY: Guilford Press.
Ek.us, C., Christensson, K., & Hjern, A. (2004). Unintentional and violent injuries among pre-school children
of teenage mothers in Sweden: A national cohort study. Journal of Epidemiology and Community Health, 58(8),
680–685.
Gallagher, M., & Waite, L. J. (2001). The case for marriage: Why married people are happier, healthier, and better
off financially. New York, NY: Random House.
Ge, X., Natsuaki, M. N., & Conger, R. D. (2006). Trajectories of depressive symptoms and stressful life events
among male and female adolescents in divorced and nondivorced families. Development and Psychopathology,
18(1), 253–273.
Goodwin, P. Y., Mosher, W. D., Chandra A. (2010, February). Marriage and cohabitation in the United States: A
statistical portrait based on Cycle 6 (2002) of the National Survey of Family Growth. [PDF] Vital Health Statistics
23(28), 1–45. Retrieved from National Center for Health Statistics, Centers for Disease Control and Prevention,
website: http://www.cdc.gov/nchs/data/series/sr_23/sr23_028.pdf
Grolnick, W. S., & Ryan, R. M. (1989). Parent styles associated with children’s self-regulation and competence in
school. Journal of Educational Psychology, 81(2), 143–154.
Lacher-Foug.re, S., & Demany, L. (2005). Consequences of cochlear damage for the detection of inter-aural phase
differences. Journal of the Acoustical Society of America, 118, 2519–2526.
Liu, H., & Umberson, D. (2008). The times they are a changin’: Marital status and health differentials from 1972 to
2003. Journal of Health and Social Behavior, 49, 239–253.
Minkin, M. J., & Wright, C. V. (2004). A woman’s guide to menopause and perimenopause. New Haven, CT: Yale
University Press.
Moore, M. R., & Brooks-Gunn, J. (2002). Adolescent parenthood. In M. H. Bornstein (Ed.), Handbook of
parenting: Being and becoming a parent (2nd ed., Vol. 3, pp. 173–214). Mahwah, NJ: Lawrence Erlbaum
Associates.
Panno, J. (2004). Aging: Theories and potential therapies. New York, NY: Facts on File Publishers.
Pluess, M., & Belsky, J. (2010). Differential susceptibility to parenting and quality child care. Developmental
Psychology, 46(2), 379–390.
Rohner, R. P., & Veneziano, R. A. (2001). The importance of father love: History and contemporary
evidence. Review of General Psychology, 5(4), 382–405.
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Rook, K. S., Catalano, R. C., & Dooley, D. (1989). The timing of major life events: Effects of departing from the
social clock. American Journal of Community Psychology, 17, 223–258.
Science Daily. (2010). Parenting style: Italians strict, French moderate, Canadians lenient. Retrieved June 2014
from http://www.sciencedaily.com/releases/2010/08/100830114946.htm
Shelton, H. M. (2006). High blood pressure. Whitefish, MT: Kessinger Publishers.
Statistics Canada. (2011). Divorces and crude divorce rates, Canada, provinces and territories, annual. (CANSIM
table 101-6501). Ottawa: Statisitcs Canada.
Twenge, J., Campbell, W., & Foster, C. (2003). arenthood and marital satisfaction: A meta-analytic review. Journal
of Marriage and Family, 65(3), 574–583.
Long Descriptions
Figure 7.9 long description: Parenting Styles
High Demands Low Demands
High Responsiveness Authoritative parenting Permissive parenting
Low Responsiveness Authoritarian parenting Rejecting-neglecting parenting
[Return to Figure 7.9]
7.4 EARLY AND MIDDLE ADULTHOOD: BUILDING EFFECTIVE LIVES • 290
7.5 Late Adulthood: Aging, Retiring, and Bereavement
Learning Objectives
1. Review the physical, cognitive, and social changes that accompany late adulthood.
2. Describe the psychological and physical outcomes of bereavement.
We have seen that, over the course of their lives, most individuals are able to develop secure attachments; reason
cognitively, socially, and morally; and create families and find appropriate careers. Eventually, however, as people
enter into their 60s and beyond, the aging process leads to faster changes in our physical, cognitive, and social
capabilities and needs, and life begins to come to its natural conclusion, resulting in the final life stage, beginning
in the 60s, known as late adulthood.
Despite the fact that the body and mind are slowing, most older adults nevertheless maintain an active lifestyle,
remain as happy as they were when younger — or are happier — and increasingly value their social connections
with family and friends (Angner, Ray, Saag, & Allison, 2009). Kennedy, Mather, and Carstensen (2004) found that
people’s memories of their lives became more positive with age, and Myers and Diener (1996) found that older
adults tended to speak more positively about events in their lives, particularly their relationships with friends and
family, than did younger adults.
Cognitive Changes During Aging
The changes associated with aging do not affect everyone in the same way, and they do not necessarily interfere
with a healthy life. Former Beatles drummer Ringo Starr celebrated his 70th birthday in 2010 by playing at Radio
City Music Hall, and Rolling Stones singer Mick Jagger (who once supposedly said, “I’d rather be dead than singing
‘Satisfaction’ at 45”) continues to perform even as he turned 70 in 2013. The golfer Tom Watson almost won
the 2010 British Open golf tournament at the age of 59, playing against competitors in their 20s and 30s. And
people such as the financier Warren Buffett; Jim Pattison, a prominent Vancouver philanthropist; Hazel McCallion,
mayor of Mississauga in Ontario for over 35 years; and actress Betty White, all in their 80s or 90s, all enjoy highly
productive and energetic lives.
Researchers are beginning to better understand the factors that allow some people to age better than others. For
one, research has found that the people who are best able to adjust well to changing situations early in life are also
able to better adjust later in life (Rubin, 2007; Sroufe, Collins, Egeland, & Carlson, 2009). Perceptions also matter.
People who believe that the elderly are sick, vulnerable, and grumpy often act according to such beliefs (Nemmers,
2005), and Levy, Slade, Kunkel, and Kasl (2002) found that the elderly who had more positive perceptions about
aging also lived longer.
Research on the influence of cultural values and beliefs on aging attitudes has been dominated by comparisons
between Eastern/Asian versus Western cultures. This belief is inspired by the idea that Asian societies are
291
influenced by Confucian values of filial piety and the practice of ancestor worship, which are thought to promote
positive views of aging and high esteem for older adults (Davis, 1983; Ho, 1994; Sher, 1984). Western societies, in
contrast, were thought to be youth-oriented and to hold more negative views about the aging process and the elderly
(Palmore, 1975). Empirical evidence for the proposed East-West differences is scarce. Although some studies have
found support for the notion that aging attitudes are more positive in Asian as compared to Western cultures (Levy &
Langer, 1994; Tan, Zhang, & Fan, 2004), others report effects in the opposite direction (Giles et al., 2000; Harwood
et al., 2001; Sharps, Price-Sharps, & Hanson, 1998; Zhou, 2007), or fail to find any marked cultural differences
(Boduroglu, Yoon, Luo, & Park, 2006; Ryan, Jin, Anas, & Luh, 2004).
Whereas it was once believed that almost all older adults suffered from a generalized memory loss, research
now indicates that healthy older adults actually experience only some particular types of memory deficits, while
other types of memory remain relatively intact or may even improve with age. Older adults do seem to process
information more slowly—it may take them longer to evaluate information and to understand language, and it takes
them longer, on average, than it does younger people, to recall a word that they know, even though they are perfectly
able to recognize the word once they see it (Burke, Shafto, Craik, & Salthouse, 2008). Older adults also have more
difficulty inhibiting and controlling their attention (Persad, Abeles, Zacks, & Denburg, 2002), making them, for
example, more likely to talk about topics that are not relevant to the topic at hand when conversing (Pushkar et al.,
2000).
But slower processing and less accurate executive control do not always mean worse memory, or even worse
intelligence. Perhaps the elderly are slower in part because they simply have more knowledge. Indeed, older
adults have more crystallized intelligence — that is, general knowledge about the world, as reflected in semantic
knowledge, vocabulary, and language. As a result, adults generally outperform younger people on measures of
history, geography, and even on crossword puzzles, where this information is useful (Salthouse, 2004). It is this
superior knowledge combined with a slower and more complete processing style, along with a more sophisticated
understanding of the workings of the world around them, that gives the elderly the advantage of wisdom over the
advantages of fluid intelligence — the ability to think and acquire information quickly and abstractly — which
favour the young (Baltes, Staudinger, & Lindenberger, 1999; Scheibe, Kunzmann, & Baltes, 2009).
The differential changes in crystallized versus fluid intelligence help explain why the elderly do not necessarily
show poorer performance on tasks that also require experience (i.e., crystallized intelligence), although they show
poorer memory overall. A young chess player may think more quickly, for instance, but a more experienced chess
player has more knowledge to draw on. Older adults are also more effective at understanding the nuances of social
interactions than younger adults are, in part because they have more experience in relationships (Blanchard-Fields,
Mienaltowski, & Seay, 2007).
Dementia and Alzheimer’s Disease
Some older adults suffer from biologically based cognitive impairments in which the brain is so adversely affected
by aging that it becomes very difficult for the person to continue to function effectively. Dementia is defined
as a progressive neurological disease that includes loss of cognitive abilities significant enough to interfere with
everyday behaviours, and Alzheimer’s disease is a form of dementia that, over a period of years, leads to a loss
of emotions, cognitions, and physical functioning, and that is ultimately fatal. Dementia and Alzheimer’s disease
are most likely to be observed in individuals who are 65 and older, and the likelihood of developing Alzheimer’s
doubles about every five years after age 65. After age 85, the risk reaches nearly 8% per year (Hebert et al.,
1995). Dementia and Alzheimer’s disease both produce a gradual decline in functioning of the brain cells that
produce the neurotransmitter acetylcholine. Without this neurotransmitter, the neurons are unable to communicate,
leaving the brain less and less functional, as shown in Figure 7.10.
7.5 LATE ADULTHOOD: AGING, RETIRING, AND BEREAVEMENT • 292
Figure 7.10 Brains. A healthy brain (left) versus a brain with advanced Alzheimer’s disease
(right).
Dementia and Alzheimer’s are in part heritable, but there is increasing evidence that the environment also plays
a role. And current research is helping us understand the things that older adults can do to help them slow down
or prevent the negative cognitive outcomes of aging, including dementia and Alzheimer’s (Pushkar, Bukowski,
Schwartzman, Stack, & White, 2007). Older adults who continue to keep their minds active by engaging in
cognitive activities, such as reading, playing musical instruments, attending lectures, or doing crossword puzzles,
who maintain social interactions with others, and who keep themselves physically fit have a greater chance of
maintaining their mental acuity than those who do not (Cherkas et al., 2008; Verghese et al., 2003). In short,
although physical illnesses may occur to anyone, the more people keep their brains active and the more they
maintain a healthy and active lifestyle, the more healthy their brains will remain (Ertel, Glymour, & Berkman,
2008).
Social Changes During Aging: Retiring Effectively
Because of increased life expectancy in the 21st century, elderly people can expect to spend approximately a
quarter of their lives in retirement. Leaving one’s career is a major life change and can be a time when people
experience anxiety, depression, and other negative changes in the self-concept and in self-identity. On the other
hand, retirement may also serve as an opportunity for a positive transition from work and career roles to stronger
family and community member roles, and the latter may have a variety of positive outcomes for the individual.
Retirement may be a relief for people who have worked in boring or physically demanding jobs, particularly if they
have other outlets for stimulation and expressing self-identity.
Psychologist Mo Wang (2007) observed the well-being of 2,060 people between the ages of 51 and 61 over an
eight-year period and made the following recommendations to make the retirement phase a positive one:
1. Continue to work part-time past retirement in order to ease into retirement status slowly.
2. Plan for retirement — this is a good idea financially, but also making plans to incorporate other kinds
of work or hobbies into post-employment life makes sense.
3. Retire with someone — if the retiree is still married, it is a good idea to retire at the same time as a
spouse, so that people can continue to work part-time and follow a retirement plan together.
4. Have a happy marriage — people with marital problems tend to find retirement more stressful because
they do not have a positive home life to return to and can no longer seek refuge in long working hours.
Couples that work on their marriages can make their retirements a lot easier.
293 • INTRODUCTION TO PSYCHOLOGY - 1ST CANADIAN EDITION
5. Take care of physical and financial health — a sound financial plan and good physical health can
ensure a healthy, peaceful retirement.
6. Retire early from a stressful job — people who stay in stressful jobs for fear that they will lose their
pensions or won’t be able to find work somewhere else feel trapped. Toxic environments can take a
severe emotional toll on an employee. Leaving an unsatisfying job early may make retirement a relief.
7. Retire “on time” — retiring too early or too late can cause people to feel “out of sync” or to feel they
have not achieved their goals.
Whereas these seven tips are helpful for a smooth transition to retirement, Wang also notes that people tend to be
adaptable, and that no matter how they do it, retirees will eventually adjust to their new lifestyles.
Death, Dying, and Bereavement
Living includes dealing with our own and our loved ones’ mortality. In her book On Death and Dying
(1997), Elisabeth Kübler-Ross describes five phases of grief through which people pass in grappling with the
knowledge that they or someone close to them is dying:
1. Denial: “I feel fine.” “This can’t be happening; not to me.”
2. Anger: “Why me? It’s not fair!” “How can this happen to me?” “Who is to blame?”
3. Bargaining: “Just let me live to see my children graduate.” “I’d do anything for a few more years.”
“I’d give my life savings if…”
4. Depression: “I’m so sad, why bother with anything?” “I’m going to die. What’s the point?” “I miss my
loved ones — why go on?”
5. Acceptance: “I know my time has come; it’s almost my time.”
Despite Kübler-Ross’s popularity, there are a growing number of critics of her theory who argue that her fivestage
sequence is too constraining because attitudes toward death and dying have been found to vary greatly across
cultures and religions, and these variations make the process of dying different according to culture (Bonanno,
2009). As an example, Japanese Americans restrain their grief (Corr, Nabe, & Corr, 2009) so as not to burden
other people with their pain. By contrast, Jews observe a seven-day, publicly announced mourning period. In some
cultures the elderly are more likely to be living and coping alone, or perhaps only with their spouse, whereas in
other cultures, such as the Hispanic culture, the elderly are more likely to be living with their sons and daughters
and other relatives, and this social support may create a better quality of life for them (Diaz-Cabello, 2004).
Margaret Stroebe and her colleagues (2008) found that although most people adjusted to the loss of a loved one
without seeking professional treatment, many had an increased risk of mortality, particularly within the early weeks
and months after the loss. These researchers also found that people going through the grieving process suffered
more physical and psychological symptoms and illnesses and used more medical services.
The health of survivors during the end of life is influenced by factors such as circumstances surrounding the
loved one’s death, individual personalities, and ways of coping. People serving as caretakers to partners or other
family members who are ill frequently experience a great deal of stress themselves, making the dying process even
more stressful. Despite the trauma of the loss of a loved one, people do recover and are able to continue with
effective lives. Grief intervention programs can go a long way in helping people cope during the bereavement period
(Neimeyer, Holland, Currier, & Mehta, 2008).
7.5 LATE ADULTHOOD: AGING, RETIRING, AND BEREAVEMENT • 294
Key Takeaways
• Most older adults maintain an active lifestyle, remain as happy as they were when younger, or
happier, and increasingly value their social connections with family and friends.
• Although older adults have slower cognitive processing overall (fluid intelligence), their
experience in the form of crystallized intelligence — or existing knowledge about the world and
the ability to use it — is maintained and even strengthened during old age.
• Expectancies about change in aging vary across cultures and may influence how people respond
to getting older.
• A portion of the elderly suffer from age-related brain diseases, such as dementia, a progressive
neurological disease that includes significant loss of cognitive abilities, and Alzheimer’s disease,
a fatal form of dementia that is related to changes in the cerebral cortex.
• Two significant social stages in late adulthood are retirement and dealing with grief and
bereavement. Studies show that a well-planned retirement can be a pleasant experience.
• A significant number of people going through the grieving process are at increased risk of
mortality and physical and mental illness, but grief counselling can be effective in helping these
people cope with their loss.
Exercises and Critical Thinking
1. How do the people in your culture view aging? What stereotypes are there about the elderly?
Are there other ways that people in your society might learn to think about aging that would be
more beneficial?
2. Based on the information you have read in this chapter, what would you tell your parents about
how they can best maintain healthy physical and cognitive function into late adulthood?
References
Angner, E., Ray, M. N., Saag, K. G., & Allison, J. J. (2009). Health and happiness among older adults: A
community-based study. Journal of Health Psychology, 14, 503–512.
Baltes, P. B., Staudinger, U. M., & Lindenberger, U. (1999). Life-span psychology: Theory and application to
intellectual functioning. Annual Review of Psychology, 50, 471–506.
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7.6 Chapter Summary
Development begins at conception when a sperm from the father fertilizes an egg from the mother, creating a new
life. The resulting zygote grows into an embryo and then a fetus.
Babies are born prepared with reflexes and cognitive skills that contribute to their survival and growth.
Piaget’s stage model of cognitive development proposes that children learn through assimilation and
accommodation and that cognitive development follows specific sequential stages: sensorimotor, preoperational,
concrete operational, and formal operational.
An important part of development is the attainment of social skills, including the formation of the self-concept and
attachment.
Adolescence involves rapid physical changes, including puberty, as well as continued cognitive changes. Moral
development continues in adolescence. In Western cultures, adolescence blends into emerging adulthood, the period
from age 18 until the mid-20s.
Muscle strength, reaction time, cardiac output, and sensory abilities begin to slowly decline in early and middle
adulthood. Fertility, particularly for women, also decreases, and women eventually experience menopause.
Most older adults maintain an active lifestyle — remaining as happy as they were when they were younger, or
happier — and increasingly value their social connections with family and friends.
Although older adults have slower cognitive processing overall (fluid intelligence), their experience in the form of
crystallized intelligence, or existing knowledge about the world and the ability to use it, is maintained and even
strengthened during aging. A portion of the elderly suffer from age-related brain diseases, such as dementia and
Alzheimer’s disease.
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