chapter 3 human development. heredity developmental psychology: the study of progressive changes in...
TRANSCRIPT
Chapter 3Human Development
Heredity
• Developmental psychology: The study of progressive changes in behavior and abilities
• Heredity (nature): Genetic transmission of physical and psychological characteristics from parents to their children
• DNA (deoxyribonucleic acid): Molecular structure shaped like a double helix that contains coded genetic information
p. 79
Genes
• Specific areas on a strand of DNA that carry hereditary information– Dominant: The gene’s feature will appear
each time the gene is present– Recessive: The gene’s feature will appear
only if it is paired with another recessive gene
– Still only 25% chance trait will be expressed
Polygenic Characteristics
• Personal traits or physical properties that are influenced by many genes working in combination
Fig. 3-1, p. 80
Fig. 3-2, p. 80
Fig. 3-3, p. 80
Developmental Level
• An individual’s current state of physical, emotional, and intellectual development
Environment (Nurture)
• All external conditions that affect a person, especially the effects of learning
Prenatal Issues
• Congenital problem: A problem or defect that occurs during prenatal development; “birth defect”
• Genetic disorder: Problem caused by inherited characteristics from parents (e.g., cystic fibrosis)
Teratogens
• Anything capable of directly causing birth defects (e.g., narcotics, radiation, cigarette smoke, lead, and cocaine)
Fetal Alcohol Syndrome (FAS)
• Caused by repeated heavy alcohol consumption during pregnancy
• Infants:– Have low birth weight, a small head, body
defects, and facial malformations– Lack cupid’s bow, the bow-shaped portion
of the upper lip (look in the mirror to see)
Sensitive Period
• A period of increased sensitivity to environmental influences; also, a time when certain events must occur for normal development to take place
p. 82
Environments: Deprivation and Enrichment
• Deprivation: Lack of normal stimulation, nutrition, comfort, or love
• Enrichment: When an environment is deliberately made more complex and intellectually stimulating and emotionally supportive
Reaction Range
• Limits that one’s environment places on the effects of heredity
p. 83
Fig. 3-5, p. 84
Temperament and Environment
• Temperament: The inherited physical “core” of personality; includes sensitivity, irritability, distractibility, and typical mood (Kagan, 2000)
Easy Children
• 40%; relaxed and agreeable
Difficult Children
• 10%; moody, intense, easily angered
Slow-to-Warm-Up Children
• 15%; restrained, unexpressive, shy
Remaining Children
• Do not fit into any specific category (Chess & Thomas, 1986)
Newborns (Neonates) and Their Reflexes
Grasping Reflex
• If an object is placed in the neonate’s palm, she’ll grasp it automatically
• All reflexes are automatic responses (i.e., they come from nature, not nurture)
Rooting Reflex
• Lightly touch the infant’s cheek and he’ll turn toward the object and attempt to nurse; helps infant find bottle or breast
Sucking Reflex
• Touch an object or nipple to the infant’s mouth and she’ll make rhythmic sucking movements
Moro Reflex
• If a baby’s position is abruptly changed or if he is startled by a loud noise, he will make a hugging motion
Fig. 3-6, p. 86
Fig. 3-7a, p. 86
Fig. 3-7b, p. 86
Fig. 3-8, p. 87
Maturation
• Physical growth and development of the body, brain, and nervous system
• Increased muscular control occurs in patterns; order of maturation is almost universal– Cephalocaudal: From head to toe– Proximodistal: From center of the body to
the extremities
Fig. 3-9, p. 88
Emotional Development
• Basic emotions: Anger, fear, joy; appear to be unlearned
• Social smile: Smiling elicited by social stimuli; like seeing a parent’s face
Social Development
• Development of self-awareness, attachment to parents/caregivers, and relationships with other children/adults
Fig. 3-11, p. 88
Contact Comfort (Harlow)
• Pleasant and reassuring feeling babies get from touching something warm and soft, especially their mother
Fig. 3-12, p. 89
Attachment
• Emotional attachment: Close emotional bond that infants form with parents, caregivers, or others
• Separation anxiety: Crying and signs of fear when a child is left alone or is with a stranger; generally appears around 8-12 months
• Separation anxiety disorder: Severe and prolonged distress displayed by children when separated from parents/caregivers– Children usually grow out of this
Quality of Infant Attachment (Ainsworth)
• Secure: Stable and positive emotional bond• Insecure-avoidant: Anxious emotional bond;
tendency to avoid reunion with parent or caregiver
• Insecure-ambivalent: Anxious emotional bond; desire to be with parent or caregiver and some resistance to being reunited with mother
Fig. 3-13, p. 90
Affectional Needs
• Emotional needs for love and affection
Fig. 3-14, p. 92
Parenting Styles (Baumrind, 2005)
Authoritarian Parents
• Enforce rigid rules and demand strict obedience to authority
• Children tend to be emotionally stiff and lacking in curiosity
Overly Permissive
• Give little guidance• Allow too much freedom, or don’t hold
children accountable for their actions • Children tend to be dependent and immature
and frequently misbehave
Authoritative
• Provide firm and consistent guidance combined with love and affection
• Children tend to be competent, self-controlled, independent, and assertive
Language Acquisition
• Cooing: Repetition of vowel sounds by infants; typically starts at 6-8 weeks
• Babbling: Repetition of meaningless language sounds (e.g., babababa); uses consonants B, D, M, and G; starts at 7 months
More on Language Acquisition
• Single-word stage: The child says one word at a time
• Telegraphic speech: Two-word sentences that communicate a single idea (e.g., “want cookie”)
Noam Chomsky and the Roots of Language
• Biological disposition: Presumed readiness of humans to learn certain skills such as how to use language – Chomsky: Language patterns are inborn
Signal
• In early language development, any behavior, such as touching, vocalizing, gazing, or smiling, that allows nonverbal interaction and turn-taking between parent and child
Parentese (Motherese)
• Pattern of speech used when talking to infants– Marked by higher-pitched voice; short,
simple sentences; slowed speech and exaggerated voice inflections; and repetition
Jean Piaget and Cognitive Development
• Piaget believed that all children passed through a set series of stages during their cognitive development; like Freud, he was a stage theorist
p. 99
Piaget: Assimilation
• Application of existing mental patterns to new situations; new situation is “assimilated” to existing mental schemes
Piaget: Accommodation
• Existing ideas are changed to fit new requirements; mental schemes are changed to accommodate new information
• More advanced form of cognitive processing
Four Stages of Piagetian Cognitive Development
The Sensorimotor Stage (0-2 Years)
• All sensory input and motor responses are coordinated; most intellectual development here is nonverbal– Object permanence: Concept that objects
still exist when they are out of sight
Video: Sensorimotor Stage: Absence of Object Permanence
Fig. 3-18, p. 101
Video: Sensorimotor Stage: Presence of Object Permanence
The Preoperational Stage (2-7 Years)
• Children begin to use language and think symbolically, yet their thinking is still intuitive and egocentric
Intuitive Thinking
• Makes little use of reasoning and logic
Egocentric Thinking
• Child is unable to accommodate viewpoints of others; thoughts are self-centered
Transformations
• Mentally changing the shape or form of a mental image or idea; children younger than 6 or 7 cannot do this
Fig. 3-14, p. 92
Video: Preoperational Conservation of Quantity
The Concrete Operational Stage (7-11 Years)
• Children become able to use concepts of time, space, volume, and number BUT in ways that remain simplified and concrete, not abstract
Piaget’s Conservation
• Mass, weight, and volume of matter remain unchanged even when the shape or appearance of objects changes
Video: Concrete Operational Stage: Conservation of Quantity
Piaget’s Reversibility of Thought
• Relationships involving equality or identity can be reversed– If A=B then B=A
Fig. 3-16, p. 98
Video: Concrete-Operational Stage: Abstract Reasoning
The Formal Operations Stage (11 Years and Up)
• Thinking now includes abstract, theoretical, and hypothetical ideas– Abstract principles: Concepts and
examples removed from specific examples and concrete situations
– Hypothetical possibilities: Suppositions, guesses, or projections
Fig. 3-17, p. 100
Video: The Formal-Operational Stage: Abstract Reasoning
Lev Vygotsky’s Sociocultural Theory
• Children’s cognitive development is heavily influenced by sociocultural factors
• Children’s thinking develops through dialogues with more capable people
Zone of Proximal Development
• Range of tasks a child cannot yet master alone even though they are close to having the necessary mental skills; they need guidance from a skilled partner in order to complete the task
Scaffolding
• Framework or temporary support. Adults help children learn how to think by scaffolding, or supporting, their attempts to solve a problem or to discover principles– Scaffolding must be responsive to a child’s
needs
Types of Child Discipline
• Power assertion: Using physical punishment or a show of force (e.g., removing toys or privileges)
• Withdrawal of love: Withholding affection• Management techniques: Combine praise,
recognition, approval, rules, and reasoning to encourage desirable behavior
Effective Parenting
• Have stable rules of conduct (consistency)• Show mutual respect, love, encouragement,
and shared enjoyment• Have effective communication
– You-message: Threats, name-calling, accusing, bossing, criticizing, or lecturing (avoid this)
– I-message: Tells children the effect their behavior had on you (use this)
Consequences
• Natural consequences: Effects that naturally follow a particular behavior; intrinsic effects
• Logical consequences: Rational and reasonable effects defined by parents
Adolescence
• Culturally defined period between childhood and adulthood
• Puberty: Hormonal changes promote rapid physical growth and sexual maturity
Life Events
• Developmental tasks: Any skill that must be mastered, or personal change that must take place, for optimal development (e.g., learning to read and adjusting to sexual maturity)
• Psychosocial dilemma: Conflict between personal impulses and the social world
Lawrence Kohlberg and Moral Development
• Moral development: When we acquire values, beliefs, and thinking abilities that guide responsible behavior
• Stage theorist, like Freud and Erikson
Kohlberg’s Three Levels of Moral Development
• Preconventional moral reasoning: Moral thinking based on consequences of one’s actions (punishment, reward, exchange of favors) or choices
• Conventional moral reasoning: Reasoning based on a desire to please others or to follow accepted rules and values
• Postconventional moral reasoning: Follows self-chosen moral principles, not those supplied by outside authorities
Erik Erikson’s Eight Stages of Psychosocial Dilemmas
p. 107
Stage One: Trust versus Mistrust (Birth–1)
• Children are completely dependent on others– Trust: Established when babies given
adequate warmth, touching, love, and physical care
– Mistrust: Caused by inadequate or unpredictable care and by cold, indifferent, and rejecting parents
Stage Two: Autonomy versus Shame and Doubt (1–3)
• Autonomy: Doing things for themselves• Overprotective or ridiculing parents may
cause children to doubt abilities and feel shameful about their actions
Stage Three: Initiative versus Guilt (3–5)
• Initiative: Parents reinforce via giving children freedom to play, use imagination, and ask questions
• Guilt: May occur if parents criticize, prevent play, or discourage a child’s questions
Stage Four: Industry versus Inferiority (6–12)
• Industry: Occurs when child is praised for productive activities, such as painting and building
• Inferiority: Occurs if child’s efforts are regarded as messy or inadequate
Stage Five (Adolescence): Identity versus Role Confusion
• Identity: For adolescents; problems answering, “Who am I?”
• Role Confusion: Occurs when adolescents are unsure of where they are going and who they are
Stage Six (Young Adulthood): Intimacy versus Isolation
• Intimacy: Ability to care about others and to share experiences with them
• Isolation: Feeling alone and uncared for in life
Stage Seven (Middle Adulthood): Generativity versus Stagnation
• Generativity: Interest in guiding the next generation
• Stagnation: When one is only concerned with one’s own needs and comforts
Stage Eight (Late Adulthood): Integrity versus Despair
• Integrity: Self-respect; developed when people have lived richly and responsibly
• Despair: Occurs when previous life events are viewed with regret; experiences heartache and remorse
Fig. 3-19, p. 103
Gerontology and the Study of Aging
• Ageism: Discrimination or prejudice based on a person’s age
• Gerontologists study aging and its effects• Intellectual Abilities:
– Fluid abilities: Abilities requiring speed or rapid learning; based on perceptual and motor abilities; may decrease with age
– Crystallized abilities: Learned (accumulated) knowledge and skills; vocabulary and basic facts
Death and Dying; Elizabeth Kubler-Ross
• Ross was a thanatologist: One who studies emotional and behavioral reactions to death and dying
• Ross described five basic reactions to death that occur, not necessarily in the following order or experienced by everyone
Five Basic Reactions to Death (Kubler-Ross)
Denial and Isolation
• Denying death’s reality and isolating oneself from information confirming that death will occur (“It’s a mistake; the doctors are wrong”)
Anger
• Asking, “Why me?” • Anger may then be projected onto the living
Bargaining
• Terminally ill will bargain with God or with themselves (“If I can live longer I’ll be a better person”)
Depression
• Feelings of futility, exhaustion and deep sadness
Acceptance
• If death is not sudden, many will accept death calmly
• Person is at peace finally with the concept of death
p. 110