Developmental Flashcards
epigenetic view (Gottlieb, 2004)
proposes that development is the result of an ongoing, bidirectional exchange between heredity and the environment
critical period
a limited period of time during which an organism is biologically prepared to acquire certain behaviors but requires the presence of appropriate environmental stimuli for development to occur
sensitive period
optimal times for the development of certain human capacities during which the individual is particularly sensitive to environmental influences, but those capacities can also develop to some degree at an earlier or later time
canalization
traits are highly influenced by genotype and relatively resistant to environmental forces (e.g., motor milestones)
range of reaction
genotype sets boundaries on the range of possible phenotypes a person may exhibit, while environmental factors determine where in that range the phenotype falls
secular trends
generational differences in physical growth and development
gene-environment correlation
refers to associations that are often found between people’s genetic makeup and the environmental circumstances they are exposed to
niche-picking
tendency of people to seek out environments that are compatible with their genetic makeup
heritability index
used to estimate the degree to which a particular trait can be attributed to genetic factors;
ranges from 0 to +1.00, with a larger value indicating a higher impact of heredity
polygenic
characteristics that are determined by multiple gene pairs rather than a single gene pair
(e.g., skin color, eye color, temperament, intelligence, susceptibility to cancer)
Huntington’s disease
a degenerative central nervous system disorder in which there is a progressive breakdown (degeneration) of nerve cells in the brain;
caused by a single autosomal dominant gene so a child of an afflicted parent has a 50% chance of inheriting this disorder
Phenylketonuria (PKU)
recessive gene disorder in which individuals lack the enzyme needed to digest the amino acid phenylalanine which, in its undigested form, acts as a toxic agent in the brain and causes severe mental retardation
recessive gene-linked abnormalities
PKU, Tay-Sachs disease, sickle-cell anemia, cystic fibrosis
Prader-Willi syndrome
rare chromosomal abnormality that usually involves a deletion (loss of a segment) on the paternal chromosome 15;
mental retardation, chronic overeating and obesity, hypogonadism, obsessive-compulsive behaviors, distinctive physical features
Klinefelter syndrome
affects males and is caused by an extra X chromosome;
develop a normal male identity but have incomplete development of secondary sex characteristics and are often infertile
Turner syndrome
affects females and occurs when all or part of an X chromosome is missing;
females don’t develop secondary sex characteristics, are infertile, and have a short stature, stubby fingers, and a webbed neck
Fragile X syndrome
due to a weak site on the X chromosome and occurs in males and females, although its negative effects are usually more evident in males who lack the influence of a normal X chromosome;
characterized by moderate to severe mental retardation, facial deformities, and a rapid, staccato speech rhythm
teratogens
substances and conditions that interfere with normal prenatal development and include drugs, toxins, malnutrition, maternal infections, and maternal stress
germinal period
extends from conception to implantation (8 to 10 days following conception);
exposure to a teratogen during this period may damage only a few cells and have little or no effect on development; or, alternatively, it may affect many cells and cause the organism’s death
embryonic period
extends from the end of the 2nd week after conception to the end of the 8th week;
developing organs are most susceptible to major structural defects as the result of exposure to a teratogen (except the CNS, which is vulnerable throughout the embryonic and fetal periods)
fetal period
extends from the beginning of the 9th week until birth;
organ systems are less affected by teratogens during this period, but exposure can cause impaired organ functioning, delayed growth, and, when it affects the brain, impaired intellectual and emotional functioning
effects of fetal alcohol syndrome (FAS) on development
growth retardation, skeletal and organ malformations, impaired motor skills, facial deformities (e.g., small eyes, flat cheeks, thin lips), microcephaly, irritability, hyperactivity, and mental retardation
effects of nicotine on development
prematurity, low birth weight, respiratory problems, and sudden infant death syndrome (SIDS);
tend to be less responsive to the environment and more irritable;
during childhood, they may exhibit hyperactivity, a short attention span, and poor academic achievement
effects of cocaine on development
spontaneous abortion in the first trimester, retarded fetal growth, prematurity, seizures, and malformations in the brain, intestines, heart, and genital-urinary tract;
highly reactive to environmental stimuli and difficult to soothe and exhibit excessive irritability, an abnormally shrill cry, and abnormal reflexes;
concentration and memory impairments, language delays, and social problems
effects of rubella on development
low birth weight, heart defects, eye cataracts, deafness, gastrointestinal anomalies, and mental retardation
effects of Herpes Simplex Virus (HSV) on development
most often transmitted from the mother to infant during delivery;
elevated risk for death, brain damage, seizures, breathing difficulties, visual problems, and skin lesions
effects of Cytomegalovirus (CMV) on development
type of herpes virus that can be passed from mother to baby during pregnancy, delivery, or breast-feeding
prenatal infection can cause death;
microcephaly, seizures, cardiovascular disease, neuromuscular defects, hearing loss, and/or mental retardation
effects of Human Immunodeficiency Virus (HIV) on development
risk of transmission from mother to baby during pregnancy and delivery ranges from 15 to 30% without preventive treatment;
elevated rates of prematurity and are often small for gestational age;
about 20% develop a serious illness in the first year of life and most of these babies die by age 4;
common effects of the disease include delays in motor and cognitive development and increased susceptibility to opportunistic infections (toxoplasmosis, pneumonia, candidiasis)
effects of prenatal malnutrition on development
1st trimester: spontaneous abortion, neural tube defects, structural abnormalities of major organs;
3rd trimester: low birth weight and low brain size and weight due to smaller neurons, less extensive branching of dendrites, and reduced myelination;
long-term consequences: increased risk for cardiovascular disease, diabetes, and other chronic diseases; delays in motor development; intellectual deficits; and behavioral problems
effects of maternal stress on development
spontaneous abortion, premature delivery, and difficult labor;
elevated risk for low birth weight, respiratory problems, higher-than-normal levels of irritability and hyperactivity, certain physical defects (e.g., cleft lip and palate), and sleep and eating problems
premature
infant born before 37 weeks;
increased risk linked to lack of prenatal care, malnutrition, younger maternal age (esp younger than age 15), drug use, low SES, and multiple births
Small-for-Gestational-Age (SGA)
birth weight below the tenth percentile of the expected weight;
greater risk than premature infants for severe problems, including asphyxia during birth, developmental delays, respiratory disease, and impaired vision and hearing
fetal distress
abnormal condition of the fetus immediately before or during birth and is detected by an abnormal slowing of labor, abnormal substances in the amniotic fluid, or an irregular heart rate
Bronfenbrenner’s Ecological Model
1) microsystem: child’s immediate environment and includes family, peers, and school
2) mesosystem: interconnections between components of the microsystem
3) ecosystem: aspects of the environment that the child is not in direct contact with but is affected by and includes each parent’s workplace, neighbors, and community services
4) macrosystem: sociocultural context in which the other systems are embedded and includes aspects of society that affect the child’s development (e.g., racism, socioeconomic conditions, culture).
5) chronosystem: represents time and includes the child’s life stages and historical events that impact development
Rutter’s (1985) 6 family characteristics that contribute to the likelihood that a child will develop a psychiatric disorder
severe marital discord, low SES, large family size or overcrowding, parental criminality, maternal psychiatric disorder, and placement of the child outside the home
MMPCLS
factors that increase children’s resistance to psychopathology even when they are exposed to multiple risk factors
experienced only a few stressors following birth, were temperamentally “easy” and socially responsive as infants, and had a parent or other caregiver who provided them with consistent care and support
microcephaly
small, underdeveloped brain
brain development
following birth involves the growth of new dendrites, creation of new synapses (synaptogenesis), and myelination (nerve fibers become covered in myelin that acts as an insulator and increases the speed of nerve impulses)
neurogenesis
production of new neurons
major infant reflexes
1) Palmar grasp reflex: grasps a finger that is pressed against the surface of his/her palm.
2) Babinski reflex: extends their big toe and fans out their small toe when the sole of the foot is stroked
3) Moro (Startle) reflex: When held in a horizontal position, the infant arches his/her back, extends his/her legs outward, and then brings them back toward the body in response to his/her head being allowed to drop or to a sudden loud noise
4) Rooting: The infant turns his/her head toward the source of stimulation when his/her cheek is stroked near the corner of the mouth
major motor milestones at 1 month
Gross Motor Skills: Turns head from side to side when prone;
Fine Motor Skills: Has strong grasp reflex
major motor milestones at 3 months
Gross Motor Skills: Holds head erect when sitting but head bobs forward; regards own hand;
Fine Motor Skills: Holds rattle; pulls at clothes; brings objects in hand to mouth
major motor milestones at 5 months
Gross Motor Skills: When sitting, holds head erect and steady; reaches and grasps; puts foot to mouth when lying facing upwards
Fine Motor Skills: Plays with toes; takes objects directly to mouth; grasps objects voluntarily
major motor milestones at 7 months
Gross Motor Skills: Sits, leaning forward on both hands; stands with help
Fine Motor Skills: Transfers objects from one hand to the other
major motor milestones at 9-10 months
Gross Motor Skills: Creeps on hands and knees; pulls self to standing position while holding onto furniture.
Fine Motor Skills: Uses thumb and index finger to grasp
major motor milestones at 11-15 months
Gross Motor Skills: Walks holding onto furniture; stands alone; walks without help (12-14 mos.).
Fine Motor Skills: Removes object from tight enclosure; turns pages in book; uses a cup; builds a tower of three or four blocks
major motor milestones at 18-24 months
Gross Motor Skills: Runs clumsily; walks up stairs with hand held (18 mos.); walks up stairs alone (24 mos.); kicks and throws ball; uses toilet during the day.
Fine Motor Skills: Uses a spoon; turns doorknobs; builds a tower of six or seven blocks
effects of early training (McGraw, 1975)
early training can affect the age at which babies achieve certain motor milestones;
early training does not affect long-term consequences for basic skills but may affect more complex skills (generally more skilled and interested in the activities)
gender differences in development
boys do better on motor tasks requiring power and strength, run faster, throw a ball farther;
girls are better at tasks that depend on fine motor skills or flexibility and in some activities that require a combination of good balance and foot movement;
by adolescence, boys excel in terms of most motor skills
sleep consolidation
ability to sleep for longer periods of time during the night with shorter periods of daytime sleep
sleep regulation
ability to control internal states of arousal in order to fall asleep at bedtime and fall back to sleep after arousal during the night
“progressive waiting method” (AKA “Ferberizing”)
parent puts the child to bed; and if the child cries, the parent reassures the child verbally and pats the child on the back but does not pick him/her up
If the child cries again later, the parent waits for a brief period before returning and repeats the same procedure
On subsequent nights, the wait period is gradually increased
vision development
prefer facial to non-facial images within a few days following birth; can discriminate the face of their mother or other caregiver from the faces of strangers by one month; detect basic colors by two or three months; have some depth perception by six months; and have visual acuity that comes close to the normal adult level (20/20) by one year
hearing development
newborns prefer the human voice to other sounds, recognize their mother’s voice, and can distinguish between the vowels “a” and “i”
Soon after birth, infants exhibit auditory localization (turning their head toward the direction of a sound), but this ability disappears between two to four months and then re-emerges and becomes fully developed by about 12 months of age
taste and smell development
newborns can distinguish between all four tastes at birth (bitter, sweet, sour, and salty) and show a preference for sweet tastes
They respond differently to pleasant and unpleasant odors during the first days following birth
pain development
infants are sensitive to pain at birth;
some research has shown that early exposure to pain affects future responses to pain
presbyopia
a loss of near vision that makes it difficult to focus on close objects
presbycusis
a decrease in the ability to hear high-frequency sounds that makes it difficult to understand human speech
effects of early vs. later maturation for boys
early: associated with positive consequences including better overall adjustment (positive self-image, greater popularity with peers) and superior athletic skill; linked to an increased risk for drug use and antisocial behavior.
late: more attention-seeking behaviors, lower levels of self-confidence and popularity, and poorer academic achievement
effects of early vs. later maturation for girls
early: negative consequences (poorer self-concept, lower academic achievement, and higher risk for MDD, ED, and substance use).
late: higher levels of sociability, popularity, and academic achievement.
negative consequences of early or late maturation are most significant when adolescents view themselves as being different from their peers
chronic illness research outcomes
(a) Children with conditions that involve brain functioning have more behavior problems and poorer social functioning
(b) Family functioning, and in particular family cohesion and support for the child, is positively correlated with adjustment in chronically ill children
(c) Parental adjustment is also positively correlated with adjustment in chronically ill children
(d) Chronically ill boys (esp 6 to 11) are at greater risk for behavioral problems than chronically ill girls, while girls are at greater risk for self-reported symptoms of distress
(e) Adolescents are at particularly high risk for not adhering to treatment regimens, in part because of their increased concern about “being different” from their peers
characteristics associated with increased risk for drug abuse during adolescence
male gender, low SES, a history of physical or sexual abuse, and low parental warmth and involvement
Piaget’s Constructivist Theory
children actively construct their understanding of the world, and this ability depends on a combination of biological maturation and experience;
equilibration (the drive toward a state of cognitive equilibrium) provides the underlying motivation for cognitive development.
disequilibrium occurs when there is a discrepancy between reality and the person’s understanding of reality; resolved through adaptation, which consists of 2 complementary processes: assimilation & accommodation
assimilation
incorporating and interpreting new information in terms of existing mental schemas
accommodation
modifying an existing schema to take into account new information
Piaget’s Stages of Cognitive Development
4 invariant and universal stages (emerge in the same sequence for all children), with each stage building upon the earlier one;
1) Sensorimotor Stage (birth to 2 years): child learns about objects through sensory information (how objects look, feel, sound, and taste) and motor activity (grasping, hitting)
2) Preoperational Stage (2 to 7 years): development of the symbolic function, which is the ability to use one thing (words and images) to stand for another and which leads to the increasing use of language, participation in symbolic (pretend) play, and the ability to solve problems mentally
3) Concrete Operational Stage (7 to 12 years): development of decentration and reversibility, which enables the child to conserve; thinks logically when dealing with concrete information but cannot process abstract information very well
4) Formal Operational Stage (12 years +): process abstract information ; characterized by hypothetical-deductive reasoning and propositional thought; adolescent egocentrism
sensorimotor stage substages
1) Early Reflexive Reactions (birth to 1 month): gain control over and practice reflexive behaviors
2) Primary Reflexive Reactions (1 to 4 months): discover pleasurable actions involving their own bodies by accident and then repeat them
3) Secondary Circular Reactions (4 to 8 months): discover actions involving objects and people in the environment and then reproduce those actions
4) Coordination of Secondary Circular Reactions (8 to 12 months): intentionally combine secondary circular reactions to achieve a goal - object permanence
5) Tertiary Circular Reactions (12 to 18 months): deliberately change an action to discover the consequences of doing so
6) Emergence of Representational Thought (18 to 24 months): begin to develop mental representations that allow them to think about the past and objects that are not present
object permanence
understanding that objects continue to exist even when they are not visible
deferred imitation
ability to imitate an observed act at a later point in time
transductive reasoning
leads preoperational children to believe that two events that occur at the same time are causally related
magical thinking
erroneous belief that one has control over objects or events or that thinking about something will actually cause it to occur
animism
belief that objects have thoughts, feelings, and other lifelike qualities
centration
tendency to focus on one detail of a situation to the neglect of other important features
conserve
understand that the underlying properties of an object may not change even when its physical appearance changes
transitivity
the ability to mentally sort objects
hierarchical classification
the ability to sort objects into hierarchies of classes and subclasses based on their similarities and differences
hypothetical-deductive reasoning
the ability to arrive at and test alternative explanations for observed events
propositional thought
the ability to evaluate the logical validity of verbal assertions without making reference to real-world circumstances
imaginary audience
belief that others are as concerned with and critical of the adolescent’s behavior as the adolescent is him/herself
personal fable
an adolescent’s belief that he or she is unique and indestructible
information processing theories
focus on specific cognitive processes (e.g., memory, attention, comprehension) and emphasize quantitative changes in cognition.
propose that humans process information through logical rules and strategies and have a limited capacity in terms of the nature and amount of information that can be processed.
children become better information processors through a combination of changes in biological systems and experience
Neo-Piagetian theories
combine Piaget’s approach with information processing theories;
recognize the roles of both biological and environmental factors in cognitive development;
development is divided into stages that represent qualitative changes in specific cognition processes
Vygotsky’s Sociocultural Theory
cognition as being dependent on the social, cultural, and historical context;
learning always occurs on 2 levels: first between the child and another person (interpersonal) and then within the child (intrapersonal)
zone of proximal development
the gap between what a child can currently do alone and what they can accomplish with help from parents or more competent peers;
learning occurs most rapidly when teaching is within this zone
scaffolding
support provided to a child by others and involves modeling, providing physical and verbal prompts, asking questions, etc.
infantile amnesia
adults cannot recall anything that occurred prior to 3 or 4 years of age;
attributed to incomplete development of the brain (esp hippocampus) and a lack of language that is needed to encode and store memories in a way that allows them to be retrieved in adulthood
memory in infancy and childhood
infants have recognition memory for familiar stimuli soon after birth and cued recall memory by 2 to 3 months;
2 or 3 YOs exhibit episodic memory (can recall experiences that happened weeks or months earlier);
as we age, get increased STM capacity; use of rehearsal and other memory strategies, improvements in metamemory and metacognition
memory in adulthood
greatest age-related declines in recent long-term memory followed by working memory;
greater negative effect on episodic memory;
more apparent in unfamiliar tasks;
Spearman’s Two-Factor Theory
all mental tasks require two kinds of ability – general ability (“g”) which is common to all intellectual tasks and specific ability (“s”) which is specific to a given task