chapter 9 ppp
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TRANSCRIPT
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Lifespan Development
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Developmental Psychology• What shapes the way we change over time?• Focus on psychological changes across the
entire life span• Every area of psychology can be looked at
from this perspective– biological development– social development– cognitive/perceptual development– personality development
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Fundamental Issues: Nature vs. Nurture
• What is role of heredity vs. environment in determining psychological makeup?– Is IQ inherited or determined early environment?– Is there a ‘criminal’ gene?– Is sexual orientation a choice or genetically
determined?
• These are some of our greatest societal debates
• Mistake to pose as “either/or” questions
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Fundamental Issues: Is Development Continuous?
• Development means change; change can be abrupt or gradual
• Two views of human development– stage theories: there are distinct phases to
intellectual and personality development– continuity: development is continuous
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Fundamental Issues in Developmental Psychology
• Critical period —Are there periods when an individual is particularly sensitive to certain environmental experiences?– Are the first hours after birth critical for parent-
child bonding?– Is first year critical for developing trust?– Easier to learn a language before age 10?
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Overview of Genetics
• Humans have 23 pairs of chromosomes
• Chromosomes are long twisted strands of DNA
• DNA is the chemical basis of heredity and carries instructions
• Genes are the basic unit of heredity; single unit of DNA on the chromosome
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Dominant and Recessive
• Genotype—underlying genetic makeup
• Phenotype—traits that are expressed
• Dominant genes—will always be expressed if present
• Recessive genes—will not be expressed unless they are in a pair
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Characteristic Dominant Recessive
Eye color Brown Grey, blue
Hair Dark Curly
Light Straight
Hands Extra fingers Limb dwarfing
5 fingers Normal limbs
Face Broad lips Dimples
Thin lips No dimples
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Sex Linked Traits• Traits linked to the X or Y (sex)
chromosomes• Usually recessive and carried on the X
chromosome• Appear more frequently in one sex than
another• Color blindness, baldness, hemophilia,
Fragile X
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Physical and Psychological Development Related
• Physical development begins at conception
• Physical maturity sets limits on psychological ability– visual system not fully functional at birth– language system not functional until much later
• Prenatal environment can have lifetime influence on health and intellectual ability
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Prenatal Development• Conception—when a sperm penetrates the ovum• Zygote—a fertilized egg• Germinal period—first two weeks after
conception• Embryonic period—weeks three through
eight after conception• Fetal period—two months after conception
until birth
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8 week embryo
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12 week fetus
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18 week fetus
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20 weeks (5 months)
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24 weeks (6 months)
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28 weeks (7 months)
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32 weeks (8 months)
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Prenatal Influences on Development
• Nutrition
• Anxiety
• Mother’s general health
• Maternal age
• Teratogens—any agent that causes a birth defect (e.g., drugs, radiation, viruses)
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Drugs
• Over the counter
• Alcohol
• Cocaine
• Heroine
• Nicotine
• Aspirin
• Excess vitamins
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Disease
• Rubella
• HIV
• Toxoplasmosis
• Herpes
• Syphilis
• Influenza
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Infant Abilities
• Infants are born with immature visual system– can detect movement and large objects
• Other senses function well on day 1– will orient to sounds– turn away from unpleasant odors– prefer sweet to sour tastes
• Born with a number of reflex behaviors
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Infant Reflexes
• Rooting—turning the head and opening the mouth in the direction of a touch on the cheek
• Sucking—sucking rhythmically in response to oral stimulation
• Grasping—curling the fingers around an object
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Social and Personality Development
• Temperament--inborn predisposition to consistently behave and react in a certain way
• Attachment-- emotional bond between infant and caregiver
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Temperament
• Easy—adaptable, positive mood, regular habits
• Slow to warm up—low activity, somewhat slow to adapt, generally withdraw from new situations
• Difficult—intense emotions, irritable, cry frequently
• Average—unable to classify (1/3 of all children)
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Quality of Attachment
• Parents who are consistently warm, responsive, and sensitive to the infant’s needs usually have infants who are securely attached
• Parents who are neglectful, inconsistent, or insensitive to infant’s needs usually have infants who are insecurely attached
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Ainsworth’s Strange Situation
• Used to study quality of attachment in infants
• Observe child’s reaction when mother is present with the child in a “strange” room
• Observe the child’s reaction when mother leaves
• Observes the child’s reaction when mother returns
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Language Development
• Noam Chomsky asserts that every child is born with a biological predisposition to learn language “universal grammar”
• Motherese or infant directed speech--style of speech used by adults (mostly parents) in all cultures to talk to babies and children
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Language Development• Infant preference for human speech over other
sounds– before 6 months can hear differences used in all languages– after 6 months begin to hear only differences used in
native language
• Cooing—vowel sounds produced 2–4 months• Babbling—consonant/vowel sounds between
4 to 6 months• Even deaf infants coo and babble
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Language Development
MONTH Speech Characteristic
2 Cooing vowel sounds 4 Babbling consonant/vowel 10 Babbling native language sounds12 One-word stage 24 Two-word stage24+ Sentences
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Young Children’s Vocabulary
• Comprehension vocabulary--words that the infant or child understands
• Production vocabulary--words that the infant or child understands and can speak
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Gender Role Development• Gender—cultural, social, and psychological
meanings associated with masculinity or femininity
• Gender roles—various traits designated either masculine or feminine in a given culture
• Gender identity—A person’s psychological sense of being male or female
• Between ages 2-3 years, children can identify themselves and other children as boys or girls. The concept of gender or sex, is, however, based more on outward characteristics such as clothing.
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Gender Differences• Toddler girls tend to play more with dolls
and ask for help more than boys• Toddler boys tend to play more with trucks
and wagons, and to play more actively• After age 3 years we see consistent gender
differences in preferred toys and activities• Children are more rigid in sex-role
stereotypes than adults
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Social Learning TheoryGender roles are acquired through the basic
processes of learning, including reinforcement, punishment, and modeling
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Gender Schema Theory•Gender-role development is influenced by the formation of schemas, or mental representations, of masculinity and femininity
•Children actively develop mental categories of masculinity ad femininity and categorize these into gender categories or schemas
•Trucks are for boys and dolls are for girls is an example of a gender schema
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Piaget’s Theory of Cognitive Development
• Jean Piaget (1896–1980) Swiss psychologist who became leading theorist in 1930s
• Piaget believed that “children are active thinkers, constantly trying to construct more advanced understandings of the world”
• Cognitive development is a stage process
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Piaget’s Approach
• Primary method was to ask children to solve problems and to question them about the reasoning behind their solutions
• Discovered that children think in radically different ways than adults
• Proposed that development occurs as a series of ‘stages’ differing in how the world is understood
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Sensorimotor Stage (birth – 2)
• Information is gained through the senses and motor actions
• Child perceives and manipulates but does not reason
• Symbols become internalized through language development
• Object permanence is acquired
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Object Permanence
• The understanding that objects exist independent of one’s actions or perceptions of them
• Before 6 months infants act as if objects removed from sight cease to exist– Can be surprised by disappearance/reappearance
of a face (peek-a-boo)
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Preoperational Stage (2–7 years)
• Emergence of symbolic thought• Centration• Egocentrism• Lack of the concept of conservation• Animism• Artificialism
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Concrete Operational Stage (7–12 years)
• Increasingly logical thought
• Classification and categorization
• Less egocentric
• Ability to understand that physical quantities are equal even if appearance changes (conservation)
• Inability to reason abstractly or hypothetically
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Formal Operational Stage (age 12 – adulthood)
• Hypothetico-deductive reasoning
• Emerges gradually
• Continues to develop into adulthood
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Critique of Piaget’s Theory• Underestimates children’s abilities
• Overestimates age differences in thinking
• Vagueness about the process of change
• Underestimates the role of the social environment
• Lack of evidence for qualitatively different stages
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Information-Processing Perspective
• Focuses on the mind as a system, analogous to a computer, for analyzing information from the environment
• Developmental improvements reflect – increased capacity of working memory– faster speed of processing– new algorithms (methods)– more stored knowledge
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Vygotsky’s Sociocultural Perspective
• Emphasized the child’s interaction with the social world (other people) as a cause of development
• Vygotsky believed language to be the foundation for social interaction and thought
• Piaget believed language was a byproduct of thought
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Vygotsky’s Sociocultural Perspective
• Vygotsky—children learn from interactions with other people
• Piaget—focused on children’s interaction with the physical world
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Adolescence
• Transition stage between late childhood and early adulthood
• Sexual maturity is attained at this time
• Puberty--attainment of sexual maturity and ability to reproduce
• Health, nutrition, genetics play a role in onset and progression of puberty
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Social Relationships
• Parent-child relationship is usually positive
• May have some periods of friction
• Peers become increasingly important
• Peer influence may not be as bad as most people think. Adolescents tend to have friends of similar age, race, social class, and with same religious beliefs.
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Erikson’s Theory• Biological because of belief that there are innate
drives to develop social relationships and that these promote survival (Darwinism)
• Divided life span into eight psychosocial stages, each associated with a different drive and a problem or crisis to resolve
• Outcome of each stage varies along a continuum from positive to negative
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Identity Development
• Identity vs. role confusion is the psychosocial stage during adolescence
• Developing a sense of who one is and where one is going in life
• Successful resolution leads to positive identity
• Unsuccessful resolution leads to identity confusion or a negative identity
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Stage 1 (birth–1)Trust vs. Mistrust
• Infants must rely on others for care
• Consistent and dependable caregiving and meeting infant needs leads to a sense of trust
• Infants who are not well cared for will develop mistrust
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Stage 2 (1–3 years) Autonomy vs. Shame and Doubt
• Children are discovering their own independence
• Those given the opportunity to experience independence will gain a sense of autonomy
• Children that are overly restrained or punished harshly will develop shame and doubt
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Stage 3 (3–5 years)Initiative vs. Guilt
• Children are exposed to the wider social world and given greater responsibility
• Sense of accomplishment leads to initiative, whereas feelings of guilt can emerge if the child is made to feel too anxious or irresponsible
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Stage 4 (5–12 years) Industry vs. Inferiority
• Stage of life surrounding mastery of knowledge and intellectual skills
• Sense of competence and achievement leads to industry
• Feeling incompetent and unproductive leads to inferiority
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Stage 5 (adolescence)Identity vs. Confusion
• Developing a sense of who one is and where one is going in life
• Successful resolution leads to positive identity
• Unsuccessful resolution leads to identity confusion or a negative identity
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Stage 6 (young adulthood)Intimacy vs. Isolation
• Time for sharing oneself with another person
• Capacity to hold commitments with others leads to intimacy
• Failure to establish commitments leads to feelings of isolation
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Stage 7 (middle adulthood)Generativity vs. Stagnation
• Caring for others in family, friends, and work leads to sense of contribution to later generations
• Stagnation comes from a sense of boredom and meaninglessness
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Stage 8 (late adulthood to death)Integrity vs. Despair
• Successful resolutions of all previous crises leads to integrity and the ability to see broad truths and advise those in earlier stages
• Despair arises from feelings of helplessness and the bitter sense that life has been incomplete
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Kohlberg’s Theory of Moral Development
• Assessed moral reasoning by posing hypothetical moral dilemmas and examining the reasoning behind people’s answers
• Proposed six stages, each taking into account a broader portion of the social world
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Levels of Moral Reasoning
• Preconventional—moral reasoning is based on external rewards and punishments
• Conventional—laws and rules are upheld simply because they are laws and rules
• Postconventional—reasoning based on personal moral standards
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Stage 1: Obedience and Punishment Orientation
• A focus on direct consequences
• Negative actions will result in punishments
• Positive actions will result in rewards
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Stage 2: Mutual Benefit
• Reflects the understanding that different people have different self-interests, which sometimes come in conflict
• Getting what one wants often requires giving something up in return
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Stage 3: Interpersonal Expectations
• An attempt to live up to the expectations of important others
• Positive actions will improve relations with significant others
• Negative actions will harm those relationships
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Stage 4: Law-and-Order Morality
• To maintain social order, people must resist personal pressures and follow the laws of the larger society
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Stage 5: Legal Principles
• A balance is struck between respect for laws and ethical principles that transcend specific laws
• Laws that fail to promote general welfare or that violate ethical principles can be changed, reinterpreted, or abandoned
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Stage 6: Universal Moral Principles
• Self-chosen ethical principles
• Profound respect for sanctity of human life
• Moral principles take precedence over laws that might conflict with them, i.e., conscientious objectors
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Adult Development
• Genetics and lifestyle combine to determine course of physical changes
• Social development involves marriage and transition to parenthood
• Paths of adult social development are varied and include diversity of lifestyles
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Late Adulthood
• Old age as a time of poor health, inactivity, and decline is a myth
• Activity theory of aging—life satisfaction is highest when people maintain level of activity they had in earlier years
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Death and Dying
• In general, anxiety about dying tends to decrease in late adulthood
• Kubler-Ross stages of dying– Denial– Anger– Bargain– Depression– Acceptance
• Not universally demonstrated
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Baumrind’s Parenting Styles
• Authoritarian—value obedience and use a high degree of power assertion
• Authoritative—less concerned with obedience, greater use of induction
• Permissive—most tolerant, least likely to use discipline
• Neglectful—completely uninvolved