Studied by 35 people
Development Psychology
a branch of psychology that studies physical, cognitive, and social change throughout the life span.
Stage theories
proposed developmental stages: Jean Piaget on cognitive development, Lawrence Kholberg on moral development, and Erik Erikson on psychosocial development.
Zygote
the fertilized egg; it enters a two-week period of rapid cell division and develops into an embryo.
Embryo
the developing human organism from about two weeks after fertilization through the second month.
Fetus
the developing human organism from 9 weeks after fertilization until birth.
Teratogens
“monster makes”; agents, such as chemicals and viruses, that can reach the embryo of the fetus during prenatal development and cause harm.
Fetal Alcohol Syndrome
physical and cognitive abnormalities in children caused by a pregnant woman’s heavy drinking.
Habituation
decreasing responsiveness with repeated stimulation. As infants gain familiarity with repeated exposure to a stimulus, their interest wanes and they look away sooner.
Maturation
Biological growth processes that enable orderly changes in behavior, relatively uninfluenced by experience.
Cognition
all the mental activities associated with thinking, knowing, remembering, and communicating.
Schema
a concept or framework that organizes and interprets information.
Assimilation
interpreting our new experiences in terms of our existing schemas.
Accomodation
adapting our current understanding (schemas) to incorporate new information.
Sensorimotor Stage
the stage (from birth to nearly 2) 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
the stage (from about 2 to 6 or 7) during which a child learns to use language but does not yet comprehend the mental operations of concrete logic.
Conservation
the principle that properties such as mass, volume, and number remain the same despite changes in the forms of objects.
Egocentrism
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
the stage of cognitive development (from about 7 to 11) during which children gain the mental operations that enable them to think logically about concrete events.
Formal Operational Stage
the stage of cognitive development (normally beginning at about 12) during which people begin to think logically about abstract concepts.
Scaffold
a framework that offers children temporary support as they develop higher levels of thinking.
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 their 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 string attachments during early life.
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 their 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.
Temperment
a person’s characteristic emotional reactivity and intensity.
Basic Trust
a sense that the world is predictable and trustworthy; said to be formed during infancy by appropriate experiences with responsive caregivers.
Self-Concept
all our thoughts and feelings about ourselves in answe to the question “Who am I?”
Sex
the biologically influenced characteristics by which people define male and female.
Gender
the socially influenced characteristics by which people define boy, girl, man, and woman.
Aggression
any physical or verbal behavior intended to harm someone physically or emotionally.
Relational Aggression
an act of aggression intended to harm a person’s relationship or social standing.
Role
a set of expectations(norms) about a social position, defining how those in the position ought to act.
Gender Roles
a set of expected behaviors, attitudes, and traits for males or for females.
Gender Identity
our sense of being male, female, or some combination of the two.
Social Learning Theory
the theory that we learn social behavior by observing and imitating and by being rewarded or punished. (“Big boys don’t cry”)
Gender Typing
the acquisition of a traditional masculine or feminine role.
Androgyny
displaying both traditional masculine and feminine psychological characteristics.
Transgender
an umbrella term describing people whose gender identity or expression differs from that associated with their birth-designated sex.
Adolescence
the transition period from childhood to adulthood, extending from puberty to independence.
Puberty
the period of sexual maturation during which a person becomes capable of reproducing.
Preconventional Morality
(before age 9) Self-interest; obey rules to avoid punishment or gain concrete rewards.
Conventional Morality
(adolescence) Uphold laws to gain social approval or maintain social order.
Postconventional Morality
(adolescence and beyond) Actions reflect belief in basic-rights and self-defined ethical principles.
Identity
our sense of self; according to Erikson the adolescent’s task is to solidify a sense of self by testing and integrating various roles.
Social Identity
the “we” aspect of our self-concept; the part of our answer to “Who am I?” that comes from our group memberships.
Intimacy
in Erikson’s theory; the ability to form close, loving relationships; a primary developmental task in young adulthood.
Emerging Adulthood
a period from about age 18 to the mid-twenties, when in many western cultures are no longer adolescents but have not yet achieved full independence as adults.
X-chromosome
the sex chromosome found in both males and females. Females typically have two X chromosomes; males typically have one. An X chromosome from each parent produces a female child.
Y-chromosome
the sex chromosome typically found only in males. When paired with an X chromosome from the mother, it produces a male child.
Testosterone
the most important male sex hormone. Both males and females have it, but the additional testosterone in males stimulates the growth of the male sex organs during the fetal period, and the development of the male sex characteristics during puberty.
Primary Sex Characteristics
the body structures (ovaries, testes, and external genitalia) that make sexual reproduction possible.
Secondary Sex Characteristics
nonreproductive sexual traits, such as female breasts and hips, male voice quality, and body hair.
Spermarche
the first ejaculation
Menarche
the first menstrual period
Intersex
a condition present at birth due to unusual combinations of male and female chromosomes, hormones, and anatomy; possessing biological sexual characteristics of both sexes.
AIDS (acquired immune deficiency syndrome)
a life-threatening, sexually transmitted infection caused by the human immunodeficiency virus(HIV). AIDS depletes the immune system, leaving the person vulnerable to infections.
Sexual Orientation
our enduring sexual attraction, usually towards members of our own sex or the other sex; variations include attraction toward both sexes.
Menopause
the time of natural cessation of menstruation; also refers to the biological changes a woman experiences as her ability to reproduce declines.
Cross-Sectional Study
research that compares people of different ages at the same point in time.
Longitudinal Study
research that follows and retests the same people over time.
Neurocognitive Disorders (NCDs)
acquired (not lifelong) disorders marked by cognitive deficits; often related to Alzheimer’s disease, brain injury or disease, or substance abuse. In older adults, neurocognitive disorders were formerly called dementia.
Alzheimer’s Disease
a neurocognitive disorder marked by neural plaques, often with onset after age 80, and entailing a progressive decline in memory and other cognitive abilities.
Social Clock
the culturally preferred timing of social events such as marriage, parenthood, and retirement.
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