ap psych

developmental psychology

developmental psychology

a branch of psychology that studies physical, cognitive, and social change throughout the life span

zygote

the fertilized egg; it enters a 2-week period of rapid cell division and develops into an embryo

embryo

the developing human organism from about 2 weeks after fertilization through the second month

fetus

the developing human organism from 9 weeks after conception to birth

teratogens

(literally, "monster maker") agents, such as chemicals and viruses, that can reach the embryo or fetus during prenatal development and cause harm

fetal alcohol syndrome (FAS)

physical and cognitive abnormalities in children caused by a pregnant woman's heavy drinking. In severe cases, signs include a small, out-of-proportion head and abnormal facial features

habituation

decreasing responsiveness with repeated stimulation. As infants gain familiarity with repeated exposure to a visual stimulus, their interest wanes and they look away sooner.

maturation

biological growth processes that enable orderly changes in behavior, relatively uninfluenced by experience

schema

a concept or framework that organizes and interprets information

assimilation

interpreting our new experiences in terms of our existing schemas

accommodation

adapting our current understandings (schemas) to incorporate new information

sensorimotor stage

in Piaget's theory, the stage (from birth to about 2 years of age) during which infants know the world mostly in terms of their sensory impressions and motor activities

object permanence

the awareness that things continue to exist even when not perceived

preoperational stage

in Piaget's theory, the stage (from about 2 to 6 or 7 years of age) during which a child learns to use language but does not yet comprehend the mental operations of concrete logic

conservation

the principle (which Piaget believed to be a part of concrete operational reasoning) that properties such as mass, volume, and number remain the same despite changes in the forms of objects

egocentrism

in Piaget's theory, the preoperational child's difficulty taking another's point of view

theory of mind

people's ideas about their own and others' mental states—about their feelings, perceptions, and thoughts, and the behaviors these might predict.

concrete operational stage

in Piaget's theory, the stage of cognitive development (from about 7 to 11 years of age) during which children gain the mental operations that enable them to think logically about concrete events

formal operational stage

in Piaget's theory, the stage of cognitive development during which people begin to think logically about abstract concepts

autism spectrum disorder

a disorder that appears in childhood and is marked by significant deficiencies in communication and social interaction, and by rigidly fixated interests and repetitive behaviors

stranger anxiety

the fear of strangers that infants commonly display, beginning by about 8 months of age

attachment

an emotional tie with another person; shown in young children by their seeking closeness to the caregiver and showing distress on separation

critical period

an optimal period early in the life of an organism when exposure to certain stimuli or experiences produces normal development

imprinting

the process by which certain animals form strong attachments during an early-life critical period

strange situation

a procedure for studying child-caregiver attachment; a child is placed in an unfamiliar environment while their caregiver leaves and then returns, and the child's reactions are observed

secure attachment

demonstrated by infants who comfortably explore environments in the presence of their caregiver, show only temporary distress when the caregiver leaves, and find comfort in the caregiver's return

insecure attachment

demonstrated by infants who display either a clinging, anxious attachment or an avoidant attachment that resists closeness

temperament

a person's characteristic emotional reactivity and intensity

Mary Ainsworth's strange situation

an experimental method designed to measure the nature of attachment between mothers and babies

insecure-avoidant attachment

a pattern of attachment in which an infant avoids connection with the caregiver, as when the infant seems not to care about the caregiver's presence, departure, or return

insecure anxious attachment

clingy to caregiver

Harry Harlow's attachment research

-developmental psychologist Harry Harlow studied infant attachment using monkeys.

-used wire frame and cloth-covered "mothers" to study the impact of nurturing touch, warmth, and food on infant monkey attachment

-found that preventing attachment with a real mother had long term effects on monkeys' behavior

authoritarian parenting

style of parenting in which parent is rigid and overly strict, showing little warmth to the child

authoritative parenting

parents set limits and enforce rules but are flexible and listen to their children

permissive parenting

A parenting style characterized by the placement of few limits on the child's behavior.

moro reflex

startle reflex, if fall will return to fetal position

babinsky

tickle feet