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A Child's World: Infancy through Adolescence, 9/e
Diane E. Papalia, University of Wisconsin-Madison
Sally Wendkos Olds
Ruth Duskin Feldman


Glossary


"difficult" children  Children with irritable temperament, irregular biological rhythms, and intense emotional responses.
"easy" children  Children with a generally happy temperament, regular biological rhythms, and a readiness to accept new experiences.
"slow-to-warm-up" children  Children whose temperament is generally mild but who are hesitant about accepting new experiences.
"still-face" paradigm  Research method used to measure mutual regulation in infants 2 to 9 months old.
A, not-B error  Tendency, noted by Piaget, for 8- to 12-month-old infants to search for a hidden object in a place where they previously found it, rather than in the place where they most recently saw it being hidden.
acceleration  Approach to educating the gifted, which moves them through a curriculum at an unusually rapid pace.
Accommodation  Piaget's term for changes in a cognitive structure to include new information.
achievement tests  Tests that assess how much children know in various subject areas.
acquired immune deficiency syndrome (AIDS)  Viral disease that undermines effective functioning of the immune system.
acute medical conditions  Illnesses that last a short time.
adaptation  Piaget's term for adjustment to new information about the environment.
adolescence  Developmental transition between childhood and adulthood entailing major physical, cognitive, and psychosocial changes.
adolescent growth spurt  Sharp increase in height and weight that precedes sexual maturity.
adolescent rebellion  Pattern of emotional turmoil, characteristic of a minority of adolescents, which may involve conflict with family, alienation from adult society, reckless behavior, and rejection of adult values.
adrenarche  Maturation of adrenal glands.
alleles  Paired genes (alike or different) that affect a trait.
altruism  Behavior intended to help others out of inner concern and without expectation of external reward.
ambivalent (resistant) attachment  Pattern in which an infant becomes anxious before the primary caregiver leaves, is extremely upset during his or her absence, and both seeks and resists contact on his or her return.
animism  Tendency to attribute life to objects that are not alive.
anorexia nervosa  Eating disorder characterized by self-starvation.
anoxia  Lack of oxygen, which may cause brain damage.
Apgar scale  Standard measurement of a newborn's condition; it assesses appearance, pulse, grimace, activity, and respiration.
aptitude tests  Tests that measure children's general intelligence, or capacity to learn.
assimilation  Piaget's term for incorporation of new information into an existing cognitive structure.
asthma  A chronic respiratory disease characterized by sudden attacks of coughing, wheezing, and difficulty in breathing.
attachment  Reciprocal, enduring tie between infant and caregiver, each of whom contributes to the quality of the relationship.
attention-deficit/hyperactivity disorder (ADHD)  Syndrome characterized by persistent inattention and distractibility, impulsivity, low tolerance for frustration, and inappropriate overactivity.
authoritarian  Baumrind's term for parenting style emphasizing control and obedience.
authoritative  Baumrind's term for parenting style blending respect for a child's individuality with an effort to instill social values.
autism  Pervasive developmental disorder of the brain, characterized by lack of normal social interaction, impaired communication and imagination, and repetitive, obsessive behaviors.
autobiographical memory  Memory of specific events in one's own life.
autonomy versus shame and doubt  Erikson's second crisis in psychosocial development, in which children achieve a balance between self-determination and control by others.
autosomes  The 22 pairs of chromosomes not related to sexual expression.
avoidant attachment  Pattern in which an infant rarely cries when separated from the primary caregiver and avoids contact upon his or her return.
basic trust versus basic mistrust  Erikson's first crisis in psychosocial development, in which infants develop a sense of the reliability of people and objects in their world.
Bayley Scales of Infant Development  Standardized test of infants' mental and motor development.
behavioral genetics  Quantitative study of relative hereditary and environmental influences.
behaviorism  Learning theory that emphasizes the predictable role of environment in causing observable behavior.
behaviorist approach  Approach to the study of cognitive development that is concerned with basic mechanics of learning.
behavior therapy  Therapeutic approach using principles of learning theory to encourage desired behaviors or eliminate undesired ones; also called behavior modification.
bilingual  Fluent in two languages.
bilingual education  System of teaching non-English-speaking children in their native language while they learn English, and later switching to all-English instruction.
bioecological theory  Bronfenbrenner's approach to understanding processes and contexts of development.
birth trauma  Injury sustained at the time of birth.
body image  Descriptive and evaluative beliefs about one's appearance.
brain growth spurts  Periods of rapid brain growth and development.
Brazelton Neonatal Behavioral Assessment Scale  Neurological and behavioral test to measure neonate's responses to the environment.
bulimia nervosa  Eating disorder in which a person regularly eats huge quantities of food and then purges the body by laxatives, induced vomiting, fasting, or excessive exercise.
bullying  Aggression deliberately and persistently directed against a particular target, or victim, typically one who is weak, vulnerable, and defenseless.
canalization  Limitation on variance of expression of certain inherited characteristics.
case study  Study covering a single case or life.
cell death  Elimination of excess brain cells to achieve more efficient functioning.
central executive  In Baddeley's model, element of working memory that controls the processing of information.
central nervous system  Brain and spinal cord.
centration  In Piaget's theory, tendency of preoperational children to focus on one aspect of a situation and neglect others.
cephalocaudal principle  Principle that development proceeds in a head-to-tail direction; that is, upper parts of the body develop before lower parts.
cesarean delivery  Delivery of a baby by surgical removal from the uterus.
child development  Scientific study of processes of change and stability from conception through adolescence.
child-directed speech (CDS)  Form of speech often used in talking to babies or toddlers; includes slow, simplified speech, a high-pitched tone, exaggerated vowel sounds, short words and sentences, and much repetition. Also called parentese.
childhood depression  Mood disorder characterized by such symptoms as a prolonged sense of friendlessness, inability to have fun or concentrate, fatigue, extreme activity or apathy, feelings of worthlessness, weight change, physical complaints, and thoughts of death or suicide.
chromosomes  Coils of DNA that carry the genes.
chronic medical conditions  Illnesses or impairments that persist for at least 3 months.
chronosystem  Bronfenbrenner's term for effects of time on other developmental systems.
circular reactions  Piaget's term for processes by which an infant learns to reproduce desired occurrences originally discovered by chance.
classical conditioning  Learning based on associating a stimulus that does not ordinarily elicit a particular response with another stimulus that ordinarily does elicit the response.
class inclusion  Understanding of the relationship between a whole and its parts.
clone (verb)  To make a genetic copy of an individual; (noun) a genetic copy of an individual.
code mixing  Use of elements of two languages, sometimes in the same utterance, by young children in households where both languages are spoken.
code switching  Process of changing one's speech to match the situation, as in people who are bilingual.
cognitive neuroscience approach  Approach to the study of cognitive development that links brain processes with cognitive ones.
cognitive perspective  View that thought processes are central to development.
cohort  Group of people who share a similar experience, such as growing up at the same time and in the same place.
commitment  Marcia's term for personal investment in an occupation or system of beliefs.
committed compliance  Wholehearted obedience of a parent's orders without reminders or lapses.
componential element  Sternberg's term for the analytic aspect of intelligence.
concordant  Term describing twins who share the same trait or disorder.
concrete operations  Third stage of Piagetian cognitive development (approximately from ages 7 to 12), during which children develop logical but not abstract thinking.
conduct disorder (CD)  Repetitive, persistent pattern of aggressive, antisocial behavior violating societal norms or the rights of others.
conscience  Internal standards of behavior, which usually control one's conduct and produce emotional discomfort when violated.
conservation  Piaget's term for awareness that two objects that are equal according to a certain measure remain equal in the face of perceptual alteration so long as nothing has been added to or taken away from either object.
constructive play  In Piaget's and Smilansky's terminology, the second cognitive level of play, involving use of objects or materials to make something.
contextual element  Sternberg's term for the practical aspect of intelligence.
contextual perspective  View of development that sees the individual as inseparable from the social context.
control group  In an experiment, a group of people similar to the people in the experimental group who do not receive the treatment whose effects are to be measured.
conventional morality (or morality of conventional role conformity)  Second level in Kohlberg's theory of moral reasoning, in which the standards of authority figures are internalized.
convergent thinking  Thinking aimed at finding the one "right" answer to a problem.
coregulation  Transitional stage in the control of behavior in which parents exercise general supervision and children exercise moment-to-moment self-regulation.
corporal punishment  Use of physical force with the intention of causing pain, but not injury, to correct or control behavior.
correlational study  Research design intended to discover whether a statistical relationship between variables exists.
crisis  Marcia's term for period of conscious decision making related to identity formation.
critical period  Specific time when a given event, or its absence, has the greatest impact on development.
cross-modal transfer  Ability to use information gained by one sense to guide another.
cross-sectional study  Study design in which people of different ages are assessed on one occasion.
cultural bias  Tendency of intelligence tests to include items calling for knowledge or skills more familiar or meaningful to some cultural groups than to others.
culture  A society's or group's total way of life, including customs, traditions, beliefs, values, language, and physical products-all learned behavior passed on from parents to children.
culture-fair  Describing an intelligence test that deals with experiences common to various cultures, in an attempt to avoid cultural bias.
culture-free  Describing an intelligence test that, if it were possible to design, would have no culturally linked content.
decenter  In Piaget's terminology, to think simultaneously about several aspects of a situation.
deductive reasoning  Type of logical reasoning that moves from a general premise about a class to a conclusion about a particular member or members of the class.
deferred imitation  Piaget's term for reproduction of an observed behavior after the passage of time by calling up a stored symbol of it.
Denver Developmental Screening Test  Screening test given to children 1 month to 6 years old to determine whether they are developing normally.
deoxyribonucleic acid (DNA)  Chemical that carries inherited instructions for the formation and function of body cells.
dependent variable  In an experiment, the condition that may or may not change as a result of changes in the independent variable.
depth perception  Ability to perceive objects and surfaces three-dimensionally.
developmental priming mechanisms  Aspects of the home environment that seem necessary for normal cognitive and psychosocial development.
differentiation  Process by which neurons acquire specialized structure and function.
discipline  Methods of molding children's character and of teaching them self-control and acceptable behavior.
dishabituation  Increase in responsiveness after presentation of a new stimulus. Compare habituation.
disorganized-disoriented attachment  Pattern in which an infant, after being separated from the primary caregiver, shows contradictory behaviors upon his or her return.
divergent thinking  Thinking that produces a variety of fresh, diverse possibilities.
dizygotic (two-egg) twins  Twins conceived by the union of two different ova (or a single ovum that has split) with two different sperm cells; also called fraternal twins.
dominant inheritance  Pattern of inheritance in which, when a child receives contradictory alleles, only the dominant one is expressed.
Down syndrome  Chromosomal disorder characterized by moderate-to-severe mental retardation and a downward-sloping skin fold at the inner corners of the eyes.
drug therapy  Administration of drugs to treat emotional disorders.
dual representation hypothesis  Proposal that children under the age of 3 have difficulty grasping spatial relationships because of the need to keep more than one mental representation in mind at the same time.
dyslexia  Developmental disorder in which reading achievement is substantially lower than predicted by IQ or age.
early intervention  Systematic process of providing therapeutic and educational services to families to help meet young children's developmental needs.
egocentrism  Piaget's term for inability to consider another person's point of view.
elaboration  Mnemonic strategy of making mental associations involving items to be remembered.
electronic fetal monitoring  Mechanical monitoring of fetal heartbeat during labor and delivery.
embryonic stage  Second stage of gestation (2 to 8 weeks), characterized by rapid growth and development of major body systems and organs.
emergent literacy  Preschoolers' development of skills, knowledge, and attitudes that underlie reading and writing.
emotional maltreatment  Action or inaction that may cause behavioral, cognitive, emotional, or mental disorders.
emotions  Subjective reactions to experience that are associated with physiological and behavioral changes.
empathy  Ability to put oneself in another person's place and feel what that person feels.
encoding  Process by which information is prepared for long-term storage and later retrieval.
English-immersion  Approach to teaching English as a second language in which instruction is presented only in English.
enrichment  Approach to educating the gifted, which broadens and deepens knowledge and skills through extra activities, projects, field trips, or mentoring.
enuresis  Repeated urination in clothing or in bed.
environment  Totality of non-genetic, or experiential, influences on development.
episodic memory  Long-term memory of specific experiences or events, linked to time and place.
equilibration  Piaget's term for the tendency to seek a stable balance among cognitive elements.
ethnic group  Group united by ancestry, race, religion, language, and/or national origins, which contribute to a sense of shared identity.
ethnographic study  In-depth study of a culture, which uses a combination of methods including participant observation.
ethological perspective  View of development that focuses on biological and evolutionary bases of behavior.
exosystem  Bronfenbrenner's term for linkages between two or more settings, one of which does not contain the child.
experiential element  Sternberg's term for the insightful aspect of intelligence.
experiment  Rigorously controlled, replicable procedure in which the researcher manipulates variables to assess the effect of one on the other.
experimental group  In an experiment, the group receiving the treatment under study.
explicit memory  Memory that is intentional and conscious.
extended family  Kinship network of parents, children, and other relatives, sometimes living together in an extended-family household.
external memory aids  Mnemonic strategies using something outside the person.
family therapy  Psychological treatment in which a therapist sees the whole family together to analyze patterns of family functioning.
fast mapping  Process by which a child absorbs the meaning of a new word after hearing it once or twice in conversation.
fertilization  Union of sperm and ovum fuse to produce a zygote; also called conception.
fetal alcohol syndrome (FAS)  Combination of mental, motor, and developmental abnormalities affecting the offspring of some women who drink heavily during pregnancy.
fetal stage  Final stage of gestation (from 8 weeks to birth), characterized by increased detail of body parts and greatly enlarged body size.
fine motor skills  Physical skills that involve the small muscles and eye-hand coordination.
fontanels  Soft spots on head of young infant.
foreclosure  Identity status, described by Marcia, in which a person who has not spent time considering alternatives (that is, has not been in crisis) is committed to other people's plans for his or her life.
formal operations  In Piaget's theory, the final stage of cognitive development, characterized by the ability to think abstractly.
functional play  In Piaget's and Smilansky's terminology, the lowest cognitive level of play, involving repetitive muscular movements.
gateway drugs  Drugs such as alcohol, tobacco, and marijuana, the use of which tends to lead to use of more addictive drugs.
gender  Significance of being male or female.
gender constancy  Awareness that one will always be male or female. Also called sex-category constancy.
gender identity  Awareness, developed in early childhood, that one is male or female.
gender roles  Behaviors, interests, attitudes, skills, and traits that a culture considers appropriate for males or for females.
gender-schema theory  Theory, proposed by Bem, that children socialize themselves in their gender roles by developing a mentally organized network of information about what it means to be male or female in a particular culture.
gender stereotypes  Preconceived generalizations about male or female role behavior.
gender-typing  Socialization process by which children learn appropriate gender roles.
generalized anxiety disorder  Anxiety not focused on any single target.
generic memory  Memory that produces scripts of familiar routines to guide behavior.
genes  Small segments of DNA located in definite positions on particular chromosomes.
genetic code  Sequence of base pairs within DNA, which determine inherited characteristics.
genetic counseling  Clinical service that advises couples of their probable risk of having children with hereditary defects.
genetic testing  Procedure for ascertaining genetic makeup to identify predispositions to hereditary diseases or disorders.
genotype  Genetic makeup of a person, containing both expressed and unexpressed characteristics.
genotype-environment correlation  Tendency of certain genetic and environmental influences to reinforce each other; may be passive, reactive (evocative), or active. Also called genotype-environment covariance.
genotype-environment interaction  The portion of phenotypic variation that results from the reactions of genetically different individuals to similar environmental conditions.
germinal stage  First 2 weeks of prenatal development, characterized by rapid cell division, increasing complexity and differentiation, and implantation in the wall of the uterus.
gonadarche  Maturation of testes or ovaries.
goodness of fit  Appropriateness of environmental demands and constraints to a child's temperament.
gross motor skills  Physical skills that involve the large muscles.
guided participation  Participation of an adult in a child's activity in a manner that helps to structure the activity and to bring the child's understanding of it closer to that of the adult.
habituation  Simple type of learning in which familiarity with a stimulus reduces, slows, or stops a response. Compare dishabituation.
handedness  Preference for using a particular hand.
heredity  Inborn influences on development, carried on the genes inherited from the biological parents.
heritability  Statistical estimate of contribution of heredity to individual differences in a specific trait within a given population.
heterozygous  Possessing differing alleles for a trait.
holophrase  Single word that conveys a complete thought.
Home Observation for Measurement of the Environment (HOME)  Instrument to measure the influence of the home environment on children's cognitive growth.
homozygous  Possessing two identical alleles for a trait.
horizontal décalage  Piaget's term for inability to transfer learning about one type of conservation to other types, which causes a child to master different types of conservation tasks at different ages.
hostile aggression  Aggressive behavior intended to hurt another person.
human genome  Complete sequence or mapping of genes in the human body and their locations.
hypotheses  Possible explanations for phenomena, used to predict the outcome of research.
hypothetical-deductive reasoning  Ability, believed by Piaget to accompany the state of formal operations, to develop, consider, and test hypotheses.
ideal self  The self one would like to be.
identification  In Freudian theory, the process by which a young child adopts characteristics, beliefs, attitudes, values, and behaviors of the parent of the same sex.
identity achievement  Identity status, described by Marcia, which is characterized by commitment to choices made following a crisis, a period spent in exploring alternatives.
identity diffusion  Identity status, described by Marcia, which is characterized by absence of commitment and lack of serious consideration of alternatives.
identity statuses  Marcia's term for states of ego development that depend on the presence or absence of crisis and commitment.
identity versus identity confusion  Erikson's fifth crisis of psychosocial development, in which an adolescent seeks to develop a coherent sense of self, including the role she or he is to play in society. Also called identity versus role confusion.
imaginary audience  Elkind's term for an observer who exists only in an adolescent's mind and is as concerned with the adolescent's thoughts and actions as the adolescent is.
implicit memory  Unconscious recall, generally of habits and skills; sometimes called procedural memory.
imprinting  Instinctive form of learning in which, during a critical period in early development, a young animal forms an attachment to the first moving object it sees, usually the mother.
independent variable  In an experiment, the condition over which the experimenter has direct control.
individual differences  Differences among children in characteristics, influences, or developmental outcomes.
individual psychotherapy  Psychological treatment in which a therapist sees a troubled person one-on-one.
inductive reasoning  Type of logical reasoning that moves from particular observations about members of a class to a general conclusion about that class.
inductive techniques  Disciplinary techniques designed to induce desirable behavior by appealing to a child's sense of reason and fairness.
industry versus inferiority  Erikson's fourth critical alternative of psychosocial development, in which children must learn the productive skills their culture requires or else face feelings of inferiority.
infant mortality rate  Proportion of babies born alive who die within the first year.
infertility  Inability to conceive after 12 to 18 months of trying.
information-processing approach  Approach to the study of cognitive development by observing and analyzing the mental processes involved in perceiving and handling information.
initiative versus guilt  Erikson's third crisis in psychosocial development, in which children balance the urge to pursue goals with moral reservations that may prevent carrying them out.
instrumental aggression  Aggressive behavior used as a means of achieving a goal.
integration  Process by which neurons coordinate the activities of muscle groups.
intelligent behavior  Behavior that is goal-oriented and adaptive to circumstances and conditions of life.
internalization  Process by which children accept societal standards of conduct as their own; fundamental to socialization.
invisible imitation  Imitation with parts of one's body that one cannot see.
IQ (intelligence quotient) tests  Psychometric tests that seek to measure intelligence by comparing a test-taker's performance with standardized norms.
irreversibility  Piaget's term for a preoperational child's failure to understand that an operation can go in two or more directions.
Kaufman Assessment Battery for Children (K-ABC)  Nontraditional individual intelligence test designed to provide fair assessments of minority children and children with disabilities.
laboratory observation  Research method in which all participants are observed in the same situation, under controlled conditions.
language  Communication system based on words and grammar.
language acquisition device (LAD)  In Chomsky's terminology, an inborn mechanism that enables children to infer linguistic rules from the language they hear.
lanugo  Fuzzy prenatal body hair, which drops off within a few days after birth.
lateralization  Tendency of each of the brain's hemispheres to have specialized functions.
learning disabilities (LDs)  Disorders that interfere with specific aspects of learning and school achievement.
learning perspective  View of development that holds that changes in behavior result from experience, or adaptation to the environment.
linguistic speech  Verbal expression designed to convey meaning.
literacy  Ability to read and write.
longitudinal study  Study design to assess changes in a sample over time.
long-term memory  Storage of virtually unlimited capacity, which holds information for very long periods.
low birthweight  Weight of less than 51/2 pounds (2,500 grams) at birth because of prematurity or being small for date.
macrosystem  Bronfenbrenner's term for overall cultural patterns.
maturation  Unfolding of a genetically influenced, often age-related, sequence of physical changes and behavior patterns, including the readiness to master new abilities.
mechanistic model  Model that views development as a passive, predictable response to stimuli.
meconium  Fetal waste matter, excreted during the first few days after birth.
menarche  Girl's first menstruation.
mental retardation  Significantly subnormal cognitive functioning.
mesosystem  Bronfenbrenner's term for linkages of two or more microsystems.
metacognition  Awareness of a person's own mental processes.
metamemory  Understanding of processes of memory.
microgenetic study  Study design that allows researchers to directly observe change by repeated testing over a short time.
microsystem  Bronfenbrenner's term for a setting in which a child interacts with others on an everyday, face-to-face basis.
mnemonic strategies  Techniques to aid memory.
monozygotic (one-egg) twins  Twins resulting from the division of a single zygote after fertilization; also called identical twins.
morality of constraint  First of Piaget's two stages of moral development, characterized by rigid, egocentric judgments.
morality of cooperation  Second of Piaget's two stages of moral development, characterized by flexible judgments and formation of one's own moral code.
moratorium  Identity status, described by Marcia, in which a person is currently considering alternatives (in crisis) and seems headed for commitment.
mother-infant bond  Mother's feeling of close, caring connection with her newborn.
multifactorial transmission  Combination of genetic and environmental factors to produce certain complex traits.
mutations  Permanent alterations in genes or chromosomes that may produce harmful characteristics.
mutual regulation  Process by which infant and caregiver communicate emotional states to each other and respond appropriately.
myelination  Process of coating neurons with a fatty substance (myelin) that enables faster communication between cells.
nativism  Theory that human beings have an inborn capacity for language acquisition.
natural childbirth  Method of childbirth that seeks to prevent pain by eliminating the mother's fear through education about the physiology of reproduction and training in breathing and relaxation during delivery.
naturalistic observation  Research method in which behavior is studied in natural settings without intervention or manipulation.
natural selection  According to Darwin's theory of evolution, process by which characteristics that promote survival of a species are reproduced in successive generations, and characteristics that do not promote survival die out.
neglect  Failure to meet a child's basic needs.
neonatal jaundice  Condition, in many newborn babies, caused by immaturity of liver and evidenced by yellowish appearance; can cause brain damage if not treated promptly.
neonatal period  First 4 weeks of life, a time of transition from intrauterine dependency to independent existence.
neonate  Newborn baby, up to 4 weeks old.
neurons  Nerve cells.
niche-picking  Tendency of a person, especially after early childhood, to seek out environments compatible with his or her genotype.
nonnormative  Characteristic of an unusual event that happens to a particular person, or a typical event that happens at an unusual time of life.
nonshared environmental effects  The unique environment in which each child grows up, consisting of distinctive influences or influences that affect one child differently than another.
normative  Characteristic of an event that occurs in a similar way for most people in a group.
nuclear family  Kinship and household unit made up of parents and their natural or adopted children.
obesity  Extreme overweight in relation to age, sex, height, and body type; sometimes defined as having a body mass index (weight-for-height) at or above the 85th or 95th percentile of growth curves for children of the same age and sex.
object permanence  Piaget's term for the understanding that a person or object still exists when out of sight.
observational learning  Learning through watching the behavior of others.
obsessive-compulsive disorder  Anxiety aroused by repetitive, intrusive thoughts, images, or impulses, often leading to compulsive ritual behaviors.
operant conditioning  Learning based on reinforcement or punishment.
operational definitions  Definitions stated in terms of operations or procedures used to produce or measure a phenomenon.
oppositional defiant disorder (ODD)  Pattern of behavior, persisting into middle childhood, marked by negativity, hostility, and defiance.
organismic model  Model that views development as internally initiated by an active organism and as occurring in a sequence of qualitatively different stages.
organization  Mnemonic strategy of categorizing material to be remembered.
organization  Piaget's term for integration of knowledge into systems.
Otis-Lennon School Ability Test  Group intelligence test for kindergarten through twelfth grade.
overt aggression  Aggression that is openly directed at its target.
participant observation  Research method in which the observer lives with the people or participates in the activity being observed.
parturition  Process of uterine, cervical, and other changes, usually lasting about two weeks, preceding childbirth.
patchwork self  Elkind's term for a sense of identity constructed by substituting other people's attitudes, beliefs, and commitments for one's own.
permissive  Baumrind's term for parenting style emphasizing self-expression and self-regulation.
personal fable  Elkind's term for conviction that one is special, unique, and not subject to the rules that govern the rest of the world.
phenotype  Observable characteristics of a person.
physical abuse  Action taken to endanger a child involving potential bodily injury.
Piagetian approach  Approach to the study of cognitive development that describes qualitative stages in cognitive functioning.
plasticity  (Modifiability of performance.) Modifiability, or "molding," of the brain through experience.
postconventional morality (or morality of autonomous moral principles)  Third level in Kohlberg's theory of moral reasoning, in which people follow internally held moral principles and can decide among conflicting moral standards.
postmature  Referring to a fetus not yet born as of 2 weeks after the due date or 42 weeks after the mother's last menstrual period.
power assertion  Disciplinary strategy designed to discourage undesirable behavior through physical or verbal enforcement of parental control.
pragmatics  The practical knowledge needed to use language for communicative purposes.
preconventional morality  First level of Kohlberg's theory of moral reasoning, in which control is external and rules are obeyed in order to gain rewards or avoid punishment, or out of self-interest.
prejudice  Unfavorable attitude toward members of certain groups outside one's own, especially racial or ethnic groups.
prelinguistic speech  Forerunner of linguistic speech; utterance of sounds that are not words. Includes crying, cooing, babbling, and accidental and deliberate imitation of sounds without understanding their meaning.
preoperational stage  In Piaget's theory, the second major stage of cognitive development, in which children become more sophisticated in their use of symbolic thought but are not yet able to use logic.
prepared childbirth  Method of childbirth that uses instruction, breathing exercises, and social support to induce controlled physical responses to uterine contractions and reduce fear and pain.
pretend play  In Piaget's and Smilansky's terminology, the third cognitive level of play, involving imaginary people or situations; also called fantasy play, dramatic play, or imaginative play.
preterm (premature) infants  Infants born before completing the thirty-seventh week of gestation.
primary sex characteristics  Organs directly related to reproduction, which enlarge and mature during adolescence.
private speech  Talking aloud to oneself with no intent to communicate.
prosocial behavior  Any voluntary behavior intended to help others.
protective factors  Influences that reduce the impact of early stress and tend to predict positive outcomes.
proximodistal principle  Principle that development proceeds from within to without; that is, parts of the body near the center develop before the extremities.
psychoanalytic perspective  View of development as shaped by unconscious forces.
psychometric approach  Approach to the study of cognitive development that seeks to measure the quantity of intelligence a person possesses.
psychosexual development  In Freudian theory, an unvarying sequence of stages of personality development during infancy, childhood, and adolescence, in which gratification shifts from the mouth to the anus and then to the genitals.
psychosocial development  In Erikson's eight-stage theory, the socially and culturally influenced process of development of the ego, or self.
puberty  Process by which a person attains sexual maturity and the ability to reproduce.
punishment  In operant conditioning, a stimulus that discourages repetition of a behavior.
qualitative change  Change in kind, structure, or organization, such as the change from nonverbal to verbal communication.
quantitative change  Change in number or amount, such as in height, weight, or size of vocabulary.
quantitative trait loci (QTL)  Interaction of multiple genes, each with effects of varying size, to produce a complex trait.
reaction range  Potential variability, depending on environmental conditions, in the expression of a hereditary trait.
real self  The self one actually is.
recall  Ability to reproduce material from memory.
recessive inheritance  Pattern of inheritance in which a child receives identical recessive alleles, resulting in expression of a nondominant trait.
reciprocity  System of mutually binding, mutually responsive relationships into which a child is socialized.
recognition  Ability to identify a previously encountered stimulus.
reflex behaviors  Automatic, involuntary, innate responses to stimulation.
rehearsal  Mnemonic strategy to keep an item in working memory through conscious repetition.
reinforcement  In operant conditioning, a stimulus that encourages repetition of a desired behavior.
relational aggression  Aggression aimed at damaging or interfering with another person's relationships, reputation, or psychological well-being; also called covert, indirect, or psychological aggression.
representational ability  Piaget's term for capacity to mentally represent objects and experiences, largely through the use of symbols.
representational mappings  In neo-Piagetian terminology, the second stage in development of self-definition, in which a child makes logical connections between aspects of the self but still sees these characteristics in all-or-nothing terms.
representational systems  In neo-Piagetian terminology, the third stage in development of self-definition, characterized by breadth, balance, and the integration and assessment of various aspects of the self.
resilient children  Children who weather adverse circumstances, function well despite challenges or threats, or bounce back from traumatic events.
retrieval  Process by which information is accessed or recalled from memory storage.
risk factors  Conditions that increase the likelihood of a negative developmental outcome.
rough-and-tumble play  Vigorous play involving wrestling, hitting, and chasing, often accompanied by laughing and screaming.
sample  Group of participants chosen to represent the entire population under study.
scaffolding  Temporary support to help a child master a task.
schemes  Piaget's term for organized patterns of behavior used in different situations.
schizophrenia  Mental disorder marked by loss of contact with reality; symptoms include hallucinations and delusions.
school phobia  Unrealistic fear of going to school, may be a form of separation anxiety disorder or social phobia.
scientific method  System of established principles and processes of scientific inquiry.
script  General remembered outline of a familiar, repeated event, used to guide behavior.
secondary sex characteristics  Physiological signs of sexual maturation (such as breast development and growth of body hair) that do not involve the sex organs.
secular trend  Trend that can be seen only by observing several generations, such as the trend toward earlier attainment of adult height and sexual maturity, which began a century ago.
secure attachment  Pattern in which an infant cries or protests when the primary caregiver leaves and actively seeks out the caregiver upon his or her return.
self-awareness  Realization that one's existence and functioning are separate from those of other people and things.
self-concept  Sense of self; descriptive and evaluative mental picture of one's abilities and traits.
self-definition  Cluster of characteristics used to describe oneself.
self-efficacy  Sense of capability to master challenges and achieve goals.
self-esteem  The judgment a person makes about his or her self-worth.
self-fulfilling prophecy  False expectation or prediction of behavior that tends to come true because it leads people to act as if it already were true.
self-regulation  Child's independent control of behavior to conform to understood social expectations.
sensorimotor stage  In Piaget's theory, the first stage in cognitive development, during which infants learn through sensory and motor activity.
sensory memory  Initial, brief, temporary storage of sensory information.
separation anxiety  Distress shown by an infant when a familiar caregiver leaves.
separation anxiety disorder  Condition involving excessive, prolonged anxiety concerning separation from home or from people to whom a child is attached.
sequential study  Study design that combines cross-sectional and longitudinal techniques.
seriation  Ability to order items along a dimension.
sex chromosomes  Pair of chromosomes that determines sex: XX in the normal female, XY in the normal male.
sex-linked inheritance  Pattern of inheritance in which certain characteristics carried on the X chromosome inherited from the mother are transmitted differently to her male and female offspring.
sexual abuse  Sexual activity involving a child and an older person.
sexually transmitted diseases (STDs)  Diseases spread by sexual contact.
sexual orientation  Focus of consistent sexual, romantic, and affectionate interest, either heterosexual, homosexual, or bisexual.
single representations  In neo-Piagetian terminology, first stage in development of self-definition, in which children describe themselves in terms of individual, unconnected characteristics and in all-or-nothing terms.
situational compliance  Obedience of a parent's orders only in the presence of prompting or other signs of ongoing parental control.
small-for-date (small-for-gestational age) infants  Infants whose birthweight is less than that of 90 percent of babies of the same gestational age, as a result of slow fetal growth.
social capital  Family and community resources upon which a person can draw.
social cognition  Ability to understand that others have mental states and to judge their feelings and intentions.
social cognitive theory  Albert Bandura's expansion of social learning theory; holds that children learn gender roles through socialization.
social construction  Concept about the nature of reality, based on societally shared perceptions or assumptions.
social-contextual approach  Approach to the study of cognitive development focusing on environmental influences, particularly of parents and other caregivers.
social interaction model  Model, based on Vygotsky's sociocultural theory, which proposes that children construct autobiographical memories through conversation with adults about shared events.
socialization  Development of habits, skills, values, and motives shared by responsible, productive members of a society.
social learning theory  Theory that behaviors are learned by observing and imitating models. Also called social cognitive theory.
social phobia  Extreme fear and/or avoidance of social situations.
social promotion  Policy in which children are automatically promoted from one grade to another even if they do not meet academic standards for the grade they are completing.
social referencing  Understanding an ambiguous situation by seeking out another person's perception of it.
social speech  Speech intended to be understood by a listener.
sociocultural theory  Vygotsky's theory of how contextual factors affect children's development.
socioeconomic status (SES)  Combination of economic and social factors describing an individual or family, including income, education, and occupation.
spermarche  Boy's first ejaculation.
spontaneous abortion  Natural expulsion from the uterus of a conceptus that cannot survive outside the womb; also called miscarriage.
Stanford-Binet Intelligence Scale  Individual intelligence test used to measure memory, spatial orientation, and practical judgment.
state of arousal  An infant's physiological and behavioral status at a given moment in the periodic daily cycle of wakefulness, sleep, and activity.
Sternberg Triarchic Abilities Test (STAT)  Test to measure componential, experiential, and contextual intelligence.
storage  Retention of memories for future use.
stranger anxiety  Wariness of strange people and places, shown by some infants during the second half of the first year.
Strange Situation  Laboratory technique used to study attachment.
stuttering  Involuntary, frequent repetition or prolongation of sounds or syllables.
substance abuse  Repeated, harmful use of a substance, usually alcohol or other drugs.
substance dependence  Addiction (physical or psychological, or both) to a harmful substance.
sudden infant death syndrome  Sudden and unexplained death of an apparently healthy infant.
symbolic function  In Piaget's terminology, ability to use mental representations (words, numbers, or images) to which a child has attached meaning.
syntax  Rules for forming sentences in a particular language.
systems of action  Increasingly complex combinations of skills, which permit a wider or more precise range of movement and more control of the environment.
telegraphic speech  Early form of sentence consisting of only a few essential words.
temperament  Characteristic disposition, or style of approaching and reacting to situations.
teratogenic  Capable of causing birth defects.
theory  Coherent set of logically related concepts that seeks to organize, explain, and predict data.
theory of mind  Awareness and understanding of mental processes.
theory of multiple intelligences  Gardner's theory that each person has several distinct forms of intelligence.
transduction  Piaget's term for a preoperational child's tendency to mentally link particular experiences, whether or not there is logically a causal relationship.
transitive inference  Understanding of the relationship between two objects by knowing the relationship of each to a third object.
triarchic theory of intelligence  Sternberg's theory describing three types of intelligence: componential (analytical ability), experiential (insight and originality), and contextual (practical thinking).
two-way (dual-language) learning  Approach to second-language education in which English speakers and non-English speakers learn together in their own and each other's languages.
ultrasound  Prenatal medical procedure using high-frequency sound waves to detect the outline of a fetus and its movements, so as to determine whether a pregnancy is progressing normally.
vernix caseosa  Oily substance on a neonate's skin that protects against infection.
violation-of-expectations  Research method in which dishabituation to a stimulus that conflicts with previous experience is taken as evidence that an infant recognizes the new stimulus as surprising.
visible imitation  Imitation with parts of one's body that one can see.
visual cliff  Apparatus designed to give an illusion of depth and used to assess depth perception in infants.
visual preference  Tendency of infants to spend more time looking at one sight than another.
visual-recognition memory  Ability to distinguish a familiar visual stimulus from an unfamiliar one when shown both at the same time.
Wechsler Intelligence Scale for Children (WISC-III)  Individual intelligence test for schoolchildren, which yields verbal and performance scores as well as a combined score.
Wechsler Preschool and Primary Scale of Intelligence, Revised (WPPSI-R)  Individual intelligence test for children ages 3 to 7, which yields verbal and performance scores as well as a combined score.
withdrawal of love  Disciplinary strategy that may involve ignoring, isolating, or showing dislike for a child.
working memory  Short-term storage of information being actively processed.
zone of proximal development (ZPD)  Vygotsky's term for the difference between what a child can do alone and with help.
zygote  One-celled organism resulting from fertilization.