Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Chapter 10: Infancy and Childhood Case Study: Bullying: A Schoolyard EpidemicBullying: A Schoolyard Epidemic Section 1: Developmental PsychologyDevelopmental Psychology Section 2: Physical DevelopmentPhysical Development Section 3: Social DevelopmentSocial Development Section 4: Cognitive DevelopmentCognitive Development Lab: Applying What You’ve LearnedApplying What You’ve Learned

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Bullying has devastating effects. It makes students think of school as a violent environment. Bullying impairs adjustment to middle school and high school. An estimated 70 to 75 percent of students are bullied at some point. Many bullies have common characteristics, including lower than average achievement and home environments troubled by violence. Facts About Bullying Case Study: Bullying: A Schoolyard Epidemic One study found that bullying was more often associated with delinquent behavior, ADHD, and depression. Bigger, more physically developed children often bully younger, smaller kids.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. What do you think? How does bullying affect students and the school atmosphere? Does bullying occur in your school? What can school officials, parents, and students do to limit or stop it?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Developmental Psychology Developmental psychology is the study of how people grow and change throughout their lives. Developmental psychologists are concerned with many issues. One issue is the extent to which heredity (nature) and environment (nurture) affect development. Another is whether people develop in distinct stages or whether development is more gradual and steady. Section 1 at a Glance

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Reading Focus Why and how do psychologists study development? How do both heredity and environment contribute to the development process? How would you describe development as a process of stages versus continuity? Main Idea The field of developmental psychology examines physical, social, and cognitive development. Heredity and environment control different aspects of development to varying degrees. Developmental Psychology

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. What can you learn about developmental psychology at the beach?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Developmental psychology is the field in which psychologists study how people grow and change throughout the life span, from conception until death. Psychologists use two methods to study people across the life span. –The longitudinal method, in which researchers select a group of participants and then observe the same group for a period of time, often years or decades –The cross-sectional method, in which researchers select a sample that includes people of different ages and then compare the participants in the different age groups The Study of Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Early childhood experiences affect people as adolescents and adults, and by studying early stages of development, psychologists can learn about developmental problems. Draw Conclusions What are two reasons that psychologists are interested in studying infancy and childhood? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Developmental psychologists are concerned with two general issues: –Ways in which heredity and environmental influences contribute to human development –Whether development occurs gradually or in stages Psychologists have long debated the extent to which human behavior is determined by heredity (nature) or environment (nurture). Maturation is the automatic and sequential process of development that results from genetic signals. A critical period is a stage or point in development during which a person is best suited to learn a particular skill or behavior pattern. Arnold Gesell proposed that maturation played the most important role in development. John Watson’s view, however, favored the tabula rasa view of development. Heredity and Environment

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: maturation, automatic and sequential process of development results from genetic signals; notion of critical periods in development when person is best suited to learn particular skill or behavior; influence of environment, nutrition, family background, culture, learning experiences Summarize Name and describe three major issues that are part of the heredity versus environment debate. Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Developmental psychologists debate whether human development occurs primarily in stages or as a continuous process. Maturational theorists generally believe that most development occurs in stages. Jean Piaget is one of the most famous stage theorists. Other psychologists, including J. H. Flavell, argue that cognitive development is a gradual and continuous process. Stages Versus Continuity

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: heredity—stages, maturation caused by genetic signals; environment—continuous, each advance is based on observation and experience Recall Which mode of development (stages or continuity) is more aligned with heredity, and which is more aligned with environment? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Physical Development Children grow physically from the time they are conceived through infancy and childhood. Reflexes, motor development, and perceptual development are all important aspects of physical development. Section 2 at a Glance

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Reading Focus How is physical growth important from conception through childhood? What are reflexes, and how are they beneficial? What is motor development? What do infants learn through the process of perceptual development? Main Idea In the womb and in infancy and childhood, humans go through a series of physical developments that are generally sequential. Physical Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. How did seat belts highlight differences in physical development?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Changes in reflexes, gains in height and weight, motor development, and perceptual development are examples of physical development. The most dramatic gains in height and weight occur before an infant’s birth. During infancy—the period from birth to the age of two years— dramatic gains continue in height and weight. During childhood—the period from two years old to adolescence— children gain on average two to three inches and four to six pounds each year until they reach the start of adolescence. Physical Growth

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: During the fourth month, the fetus nearly doubles in length, can open and close its mouth, and swallow. In the next two months, the fetus’s skin finishes developing, hair and nails become visible, and it can open and close its eyes. Recall Give three examples of developments that occur during the fetal stage. Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. A reflex is an involuntary reaction or response, such as swallowing. Reflexes are inborn, not learned, and they occur automatically. Reflexes include: –Grasping –Rooting –Sucking –Swallowing –The Moro reflex –The Babinski reflex As children develop, many reflexes, such as rooting and sucking, disappear. Some reflexes remain and others come under voluntary control. Reflexes

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Click on the image to play the Interactive.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: by rooting and sucking and by withdrawing from painful stimuli Describe How do newborns respond to their environment? Give two examples. Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. The development of purposeful movement is called motor development. Gross motor development refers to babies’ progress in coordinating major muscle groups. Fine motor development refers to coordination of the hands, face, and other small muscles. The point at which various types of motor development occur is different from infant to infant and even from culture to culture. Motor Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: gross motor development and fine motor development Identify What are the two types of motor development? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Infants tend to prefer new and interesting stimuli. Infants’ perceptual preferences are influenced by their age. Infants’ depth perception seems to be influenced by experience. Perceptual Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Physical development and environmental stimuli combine to advance infants’ perceptual development as the infants take in the messages delivered by their senses. Recall What elements make up perceptual development? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Raising a Better Child In the past, ideas about how to raise children generally came from one’s own family, religion, and other institutions within the community. Beginning around the 1900s, however, the theories of psychologists increasingly began to inform American parenting strategies. Why did parents look beyond traditional sources to learn how to raise their children? Psychology in Today’s World Social upheavals of the last hundred years give clues to the answer. One popular parenting idea is the “Mozart effect,” which says that playing Mozart’s music helps boost children’s intelligence. Results have been shown to be limited, however. Another idea deals with the importance of play. Some parenting books and theories have more merit than others. Parents need to do their homework when looking for help with their kids.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Thinking Critically What does the large number of child-rearing books suggest about the challenges that parents face? How do you think the ways that you played as a child have affected you?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Social Development Through the process of social development, infants and children learn to relate to other people. Attachment bonds infants and children to those close to them, and the quality of this attachment affects how they develop. Parenting styles cover a wide range, but some styles are more likely to produce well-adjusted children who place a high value on themselves. The value one places on one’s self is called self-esteem. Section 3 at a Glance

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Reading Focus Why is attachment vital to human relationships? How do styles of parenting differ? What are some issues associated with child abuse and neglect? How does outside child care affect children's development? What is the importance of self-esteem to developing children? Main Idea Social development in infants and children has much to do with parents’ behaviors, histories, personalities, and abilities. Other caregivers are involved in raising many American children. Social Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. What can baby cranes tell us about social development?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Attachment is an important factor affecting social development. It is defined as the emotional ties that form between people. Up until four months of age, infants prefer being held or even just being with someone. By about four months, infants develop strong attachments to their main caregivers, usually their mothers. By about eight months, some infants develop stranger anxiety and separation anxiety. Development of Attachment Attachment Based on studies with monkeys, researchers have concluded that attachment grows more from contact comfort than from feeding. Bonds of attachment between mothers and infants appear to provide a secure base from which infants can explore their environments. Contact Comfort

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Secure Versus Insecure Attachment When mothers or other primary caregivers are affectionate and reliable, infants usually become securely attached. When caregivers are unresponsive or unreliable, infants are usually insecurely attached. Secure infants may mature into secure children. Imprinting For many animals, attachment is an instinct. In a process called imprinting, some animals become attached to the first moving object they see. Children do not imprint. It takes several months before children become attached to their main caregivers.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Autism Autism is a developmental disorder that prevents children from forming proper attachments with others. People with autism have a very wide variety of symptoms from very severe to very subtle. Mild autism can go undiagnosed for years. Parents and doctors often recognize symptoms of autism during infancy and early childhood.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Contact comfort is an instinctual need to touch and be touched by something soft. It was originally thought that infants became attached to those who fed them, but recent findings indicate that attachment grows more from such bodily contact. Define What is contact comfort and how does it relate to the idea of attachment? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Warm or Cold? Warm parents show a great deal of affection to their children. Cold parents may not be as affectionate toward their children or appear to enjoy them as much. Research suggests that children fare better when their parents are warm to them. Children of warm parents are more likely to be well adjusted. Strict or Permissive? Some parents are strict with their children, imposing many rules and supervising their children closely. Some parents are permissive with their children, imposing fewer rules and watching their children less closely. Authoritative parents combine warmth with age appropriate rules and responsibilities. Authoritarian parents believe in obedience for its own sake. Styles of Parenting

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Yes. Parents can be strict but still love their children. Authoritative parents combine warmth with age-appropriate rules and responsibilities, whereas authoritarian parents are cold and rejecting, and value obedience for its own sake. Describe Can a parent be warm but strict or cold but permissive? Explain how parenting styles can be a mix of things. Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Most parents are kind and loving to their children. Yet child abuse is relatively widespread and seriously underreported. The following factors are associated with child abuse and neglect: –Stress, especially from unemployment or poverty –A history of physical or sexual abuse in at least one parent’s family –Acceptance of violence as a way of coping with stress –Lack of attachment to the child –Substance abuse –Rigid attitudes about child rearing Studies show that children who are abused run a higher risk of developing psychological problems. Child abuse tends to run in families. Child Abuse and Neglect

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Children who have been abused are more likely to act in violent ways; they may imitate their parents’ behavior, or they may adopt their parents’ strict ideas about discipline. Describe Why is a parent with a history of child abuse in his or her own family more likely to become a child abuser? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Most American parents work outside the home and more than half of mothers of children younger than one year of age are working mothers. Millions of preschoolers are cared for in day-care facilities. Studies of the effects of day care on parent-child attachments have shown mixed results. Day care seems to have mixed effects on other aspects of children’s social development. The quality of care seems to be more important than who provides it. Child Care

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: partly because of the differences in quality of care provided in different day-care centers, and partly because psychologists have interpreted the same phenomena in different ways Recall Explain why the effects of day care on children are said to be mixed. Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Self-esteem, the value or worth that people attach to themselves, begins to develop in early childhood. Secure attachment plays a major role in influencing self-esteem. Another influence is how parents react to their children. Children who receive unconditional positive regard usually develop high self-esteem. Children who receive conditional positive regard may have lower self-esteem. Influences on Self-Esteem Self-Esteem Girls tend to display greater competence in reading and general academic skills and boys tend to display competence in math and physical skills. This may be because this is what girls and boys are supposed to be good at. It is not for a genetic reason. Gender and Self-Esteem

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. The Self-Esteem Trap By the 1970s, greater self-esteem was thought of by many as a potential cure-all for society’s problems. Showering children with praise regardless of their performance was the common practice. Findings in 2000 showed that high self-esteem in children did not lead to higher grades and that high self-esteem did not make violent kids any less so or keep kids from becoming bullies. Focusing on building self-esteem at the expense of other qualities, such as self-control or self-discipline, may be misguided. Age and Self-Esteem Although children gain in competence as they grow older, their self- esteem tends to decline during the elementary school years. It seems to reach a low point at about age 12 or 13 and increases again during adolescence.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: It begins to develop in early childhood. It is influenced by the way parents react to their children and by fostering a sense of competence. Recall When and how does a person’s sense of self-esteem develop? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Inside the Autistic Mind People with autism have a difficult road in life. The list of possible problems associated with autism is long and troubling. Recent research is looking deep into the brains of people with autism to help explain and attempt to deal with the condition. Current Research in Psychology Researchers are observing brain activity in mother-child pairs where the child has autism in order to learn about differences in brain functions in people with autism versus people without autism. Other research focuses on the study of mirror neurons. Studies of the mirror neuron systems of people with autism show that they responded when they performed an activity, but not when they observed it. These two areas of research may help doctors diagnose autism earlier and help in the development of treatments.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Thinking Critically Why do you think the mothers are involved in the first study described? Why do you think mirror neuron problems lead to empathy and language shortcomings?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Cognitive Development Cognitive development is the development of people’s thought processes. The psychologist Jean Piaget divided cognitive development into four stages: the sensorimotor stage, the preoperational stage, the concrete-operational stage, and the formal-operational stage. The psychologist Lawrence Kohlberg’s theory of moral development has three stages: the preconventional level, the conventional level, and the postconventional level. Each of these three levels is further divided into two levels. Section 4 at a Glance

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Reading Focus What are the stages of Piaget’s theory of cognitive development? How did Kohlberg use a moral dilemma to illustrate his theory of moral development? Main Idea The study of cognitive development looks at how people’s thought processes change and evolve over time. Jean Piaget and Lawrence Kohlberg are two influential theorists in this area. Cognitive Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Have you ever spent some quality time with a five-year-old?

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. The Sensorimotor Stage The first stage of cognitive development is the sensorimotor stage. This stage is characterized by learning to coordinate sensation and perception with motor activity. It is also characterized by object permanence. Assimilation and Accommodation Piaget believed that human beings use assimilation and accommodation to organize new information. Assimilation is the process by which new information is placed into categories that already exist. Accommodation is change brought about by new information. Piaget’s Theory of Cognitive Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. The Concrete-Operational Stage In the concrete-operational stage, children begin to show signs of adult thinking. They are logical only when they think about specific objects and concrete experiences. They focus on two dimensions of a problem at the same time. They are less egocentric than children in earlier stages. The Preoperational Stage The next stage is the preoperational stage. It is characterized by one-dimensional thinking and egocentrism.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Criticism of Piaget’s Theories Some psychologists have questioned the accuracy of Piaget’s views. Recent research indicates that preschoolers are less egocentric than Piaget’s research suggested. His theories are still respected, however. The Formal-Operational Stage The final stage in Piaget’s theory is the formal-operational stage. People in this stage think abstractly. They can deal with hypothetical situations. They can solve problems and use imagination.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: Sensorimotor Stage, Preoperational Stage, Concrete-Operational Stage, Formal-Operational Stage Recall What are the stages of Piaget’s theory of cognitive development? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. The Preconventional Level Children through the age of nine use preconventional moral reasoning to base their judgments of the consequences of behavior. The Postconventional Level Reasoning based on a person’s own moral standards of goodness is called postconventional moral reasoning. The Conventional Level People at this level use conventional moral reasoning to make judgments in terms of whether an act conforms to conventional standards of behavior. Bias in Kohlberg’s Theory Kohlberg’s stages and scoring system may have been biased to favor males. Kohlberg’s Theory of Moral Development

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Answer: People evolve from self-preservation (avoiding punishment) to operating under the dictates of their own consciences. Describe How does moral reasoning change throughout Kohlberg’s stages? Reading Check

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Prenatal and Postnatal Development How do fetuses and infants develop in the United States and in other parts of the world? You will be assigned to one of two groups. Group A will research prenatal physical development. Group B will research postnatal physical development. Each group will give an oral presentation of their findings. 1. Introduction Lab: Applying What You’ve Learned Group A will organize itself into three teams. Each team will research a different trimester of prenatal development. Group B should organize itself into four teams. Each team will research a six-month period of the first two years of postnatal development. 2. Form Groups and Research

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. Each Group A team will research a health care issue or social problem that affects fetal development in another country. Group B will research cultural differences in motor development. Each Group B team will find a country where children develop differently. 3. Research International Issues Lab (cont'd.) Work as a team to organize your information into an oral presentation. The presentation should be under five minutes. Several members should act as speakers. 4. Organize Your Findings and Give Your Presentation

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor. What surprised you most about prenatal development? Which issue that affects unborn children in different countries concerned you the most? Why? Which age period of motor development did you find most interesting? Why? Did any of the international differences in motor development come as a surprise to you? Explain. 5. Discussion Lab (cont'd.)

Infancy and Childhood Original Content Copyright by HOLT McDougal. Additions and changes to the original content are the responsibility of the instructor.