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CHAPTER 3The Voyage Through the Life Span
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Prenatal Development
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Prenatal Development
• Germinal Stage– the first stage of prenatal development,
during which the dividing mass of cells has not become implanted in the uterine wall
– Zygote (a fertilized ovum or egg cell) divides and becomes implanted in the uterine wall
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Prenatal Development
• Embryonic Stage– Implantation until about 8th week– Major organ systems are formed (NS &
heart)– Genetic code (XX or XY) causes sex
organs to differentiate• Y sex chromosome – testes form and
produce androgens
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Prenatal Development
• Embryonic Stage– Embryo is suspended in amniotic sac
• Nutrients and wastes are exchanged with mother through placenta
• Embryo is connected to placenta by umbilical cord (a tube between the mother and her developing child through which nutrients and waste product are conducted)
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Prenatal Development
• Fetal Stage– Beginning of third month until birth– Characterized by maturation and gains in
size– Movement of the fetus is prevalent
(kicking sensation to the mother)
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Childhood
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Physical Development
• Reflexes– Simple, unlearned, stereotypical
responses elicited by specific stimuli• Rooting and sucking, withdrawal,
startle, grasping• Motor Development
– Brain maturation and environmental factors
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Motor Development
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Physical Development
• Perceptual Development– Within days, infant can track moving light– At 2-months prefer human face as visual
stimuli• Fixation time – measure of visual
preference– Perceive depth about time begin crawling
• Visual cliff experiments
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Physical Development
• Perceptual Development– Newborns hear normally; prefer mother’s
voice• Show no preference for father’s voice
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Cognitive Development
• The way in which children mentally represent and think about the world– Jean Piaget – Cognitive-development
theory– Lev Vygotsky – Sociocultural theory– Lawrence Kohlberg – Theory of moral
development
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Piaget’s Cognitive-Development Theory
• Schema– according to Piaget, a hypothetical “mental
structure” that permits the classification and organization of new information
• Assimilation– the inclusion of a new event into an existing
schema• Accommodation
– the modification of schemas so that information inconsistent with existing schemas can be integrated or understood
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Piaget’s Cognitive-Development Theory
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Stages of Cognitive-Development Theory
• Sensorimotor Stage– the first of Piaget’s stages of cognitive
development, characterized by coordination of sensory information and motor activity, early exploration of the environment, and lack of language
– Object Permanence• recognition that objects removed from
sight still exist
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Stages of Cognitive-Development Theory
• Preoperational Stage– Use words and symbols to represent objects and
relationships among them– Egocentrism (the assumption that others view
the world as one does oneself)– Animism (life as something physical)– Artificialism (rain as a human invention)– Conservation (recognition that basic properties
of substances such as weight and mass remain the same when superficial features change)
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Stages of Cognitive-Development Theory
• Objective Responsibility– according to Piaget, the assignment of blame
according to the amount of damage done rather than the motives of the actor
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Stages of Cognitive-Development Theory
• Concrete Operational Stage– Piaget’s third stage, characterized by logical
thought concerning tangible objects, conservation, and subjective morality
– Decentration (simultaneous focusing on more than one dimension of a problem, so that flexible, reversible thought becomes possible)
– Reversibility (Recognition that processes can be undone)
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Stages of Cognitive-Development Theory
• Subjective Moral Judgment– according to Piaget, moral judgment that is
based on the motives of the perpetrator
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Evaluation of Piaget’s Theory
• Piaget tended to underestimate children’s abilities
• Egocentrism and conservation appear to be more continuous than Piaget thought
• Developmental sequences do not vary
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Lev Vygotsky’s Sociocultural Theory
• Continuous theory focused on influence of culture and children’s interactions with elders
• Children internalize explanations that encourage skill development
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Lev Vygotsky’s Sociocultural Theory
• Zone of proximal development (ZPD)– Vygotsky’s term for the situation in which
a child carries out tasks with the help of someone who is more skilled, frequently an adult who represents the culture in which the child develops.
• Scaffolding– Vygotsky’s term for temporary cognitive
structures or methods of solving problems that help the child as he or she learns to function independently
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Lawrence Kohlberg’s Theory of Moral Development
• Use of “moral dilemma” story to explore reasoning of right and wrong
• Stage theory with a specific sequence
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Lawrence Kohlberg’s Theory of Moral Development
• Preconventional Level– a period during which moral judgments
are based largely on expectation of rewards or punishment• Stage 1 – Obedience and punishment• Stage 2 – Good behavior allows
people to satisfy their needs
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Lawrence Kohlberg’s Theory of Moral Development
• Conventional Level– Base judgment on conformity to
conventional standards of right and wrong; a period during which moral judgments largely reflect social conventions; a “law and order” approach to morality• Stage 3 – Good-boy orientation• Stage 4 – Judgments are based on
rules that maintain social order
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Lawrence Kohlberg’s Theory of Moral Development
• Postconventional Level– Base judgment on need to maintain
social order and personal conscience
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Evaluation of Kohlberg’s Theory of Moral Development
• Research suggests moral reasoning does follow a sequence
• Most people do not reach postconventional level (consistent with formal operational thought)
• Kohlberg underestimated the influence of social, cultural, and educational institutions and parents
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Social and Emotional Development
• Erik Erikson’s Psychosocial Development– Eight stages that represent life crises
• Trust versus Mistrust - during which children do—or do not—come to trust that primary caregivers and the environment will meet their needs
• Autonomy versus Shame and Doubt• Industry versus Inferiority
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Attachment
• Emotional tie between one animal/person and another specific individual
– Mary Salter Ainsworth• Behavior that defines attachment
– Attempts to maintain contact– Anxiety when separated
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Attachment
• Strange Situation– Method to assess infants’ response to
separations and reunions with caregivers and a stranger
• Three Types of Attachment– Secure attachment– Avoidant attachment– Ambivalent/resistant attachment
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Stages of Attachment
• Initially infants show indiscriminate attachment
• Beginning about 4 months of age– Initial-preattachment phase– Attachment-in-the-making phase– Clear-cut-attachment phase
• Fear of strangers – 8 to 10 months
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Theoretical Views of Attachment
• Behaviorists viewed attachment as learned behavior based on caregiver’s attention
• Harry F. Harlow– Inborn need for contact comfort (a
hypothesized primary drive to seek physical comfort through contact with another)
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Theoretical Views of Attachment
• Konrad Lorenz– Ethologist – attachment is an instinct– Critical period– Imprinting
• Ainsworth and Bowlby– Attachment is instinctive in humans
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Parenting Styles
• Diana Baumrind’s styles of parenting– Connection between parental behavior
and development of instrumental competence
• Instrumental competence is the ability to manipulate the environment to achieve one’s goals.– Four aspects of parental behavior - 1)
Strictness; 2) Demands for child to achieve intellectual, emotional and social maturity; 3) Communication ability; 4) Warmth and involvement
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Parenting Styles
• Diana Baumrind’s styles of parenting– authoritative parents – parents who are strict
and warm; authoritative parents demand mature behavior but use reason rather than force in discipline
– authoritarian parents – parents who are rigid in their rules and who demand obedience for the sake of obedience
– permissive parents – parents who impose few, if any, rules and who do not supervise their children closely
– uninvolved parents – parents who generally leave their children to themselves
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Parenting Styles (Outcomes)
• Diana Baumrind’s styles of parenting– Authoritative – children have greatest self-
reliance, self-esteem, social competence, and achievement motivation
– Authoritarian – children are withdrawn or aggressive and usually do not do as well in school as children of authoritative parents
– Permissive – children seem to be less mature and are often impulsive, moody, and aggressive
– Uninvolved – children tend to be more likely to hang out with crowds who “party” a good deal and use drugs
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Adolescence
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Physical Development
• Growth spurt • Puberty
– Begins with appearance of secondary sex characteristics
– Menarche• Usually occurs between 11 and 14
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Cognitive Development
• Piaget’s Formal Operations Stage– Classification, logical thought, ability to
hypothesis– Abstract thinking– Able to deal with hypothetical situations
• Adolescent Egocentrism– Imaginary Audience– Personal Fable
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Moral Reasoning
• Kohlberg’s Postconventional Level– Many people do not reach this level– Judgment is based on person’s own
moral standards– Stage 5 – Laws are made to preserve
order but exceptions can occur– Stage 6 – Adherence to universal ethical
principles
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Sex Differences and Moral Reasoning
• Kohlberg’s theory shows higher levels of moral reasoning in boys
• Carol Gilligan argues difference is result of socialization
– Girls make judgments based on needs of others
– Boys make judgments based on logic
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Social and Emotional Development
• “Storm and stress” or calm and joyous?• Independence is the challenge of
adolescence• Erikson’s Psychosocial Development
– Ego Identity versus Role Diffusion• Adolescent Sexuality
– About 50% of American teens engage in sexual intercourse
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Adulthood
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Physical Development
• Young adulthood– Usually height of physical prowess
• Middle adulthood– Gradual physical decline– Women – menopause
• Late Adulthood– Bones become brittle – greater risk for
falls– Slower response time
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Cognitive Development
• Creativity can be evidenced throughout lifetime
• Memory functioning declines with age– Crystallized intelligence– Fluid intelligence
• Tasks that require speed and visual spatial skills decline
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Alzheimer’s Disease
• Progressive form of mental deterioration– Affects 1% of people at age 60; 50%
past age 85– It is a disease, not a normal progression
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Social and Emotional Development
• Great variety based on cultural expectations and individual behavior patterns
• Trends– More optimistic than previous
generation– Grow psychologically healthier as they
advance to middle age
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Young Adulthood
• Pursuit of ‘Dream’– Blueprint for life
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Erikson’s Psychosocial Development
• Young adulthood– Intimacy versus Isolation
• Middle adulthood– Generativity versus Stagnation– Midlife transition – Midlife crisis
• Late adulthood– Ego integrity versus Despair