Psych 1101 Study 3,10,13,14 Flashcards
Mode
most frequent occurring score
mean
Arithmetic average of the scores
median
Middle score in a distribution
range
Difference between the highest and lowest scores in a distribution
normal curve
Symmetrical, bell shaped
- most(68%) scores fall between one SD above and one SD below
Standard deviation
assesses how much scores vary around the mean score
statistical significance
a statistical statement of how likely it is that an obtained result occurred by chance.
behavior genetics
the study of the relative power and limits of genetic and environmental influences on behavior.
heredity
the genetic transfer of characteristics from parents to offspring.
DNA
a complex molecule containing the genetic information that makes up the chromosomes.
environment
every nongenetic influence, from prenatal nutrition to the people and things around us.
Chromosomes
threadlike structures made of DNA molecules that contain the genes.
genes
the biochemical units of heredity that make up the chromosomes; small segments of DNA capable of synthesizing proteins.
genome
A genome is an organism’s complete set of DNA.
Identical(monozygotic) twins
- share 100% of these genes
- develop from a single fertilized egg that splits.
Fraternal(dizygotic) twins
- share 50% of these genes
- develop from two separate fertilized eggs.
Heritability Statistic
Proportion of phenotypic (behavioral) variance that can be explained by genes
molecular genetics
studies the molecular structure and function of genes.
Developmental psychology
examines our physical, cognitive, and social development across the life span
molecular behavior genetics
the study of how the structure and function of genes interact with our environment to influence behavior.
Cross-sectional study
measure different age groups AT THE SAME TIME
Longitudal study
follow the SAME people over time
zygote
conception to 2 weeks
embryo
2 weeks through 8 weeks
fetus
9 weeks to birth
teratogen
Environmental agent such as virus or chemical that causes a birth defect
fetal alcohol syndrome
physical and cognitive abnormalities in children caused by a pregnant woman’s heavy drinking.
habituation
a decrease in responding 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
concepts or mental molds into which we pour our experiences
assimilation
interpreting our new experiences in terms of our existing schemas.
accommodation
(1) in developmental psychology, adapting our current understandings (schemas) to incorporate new information. (2) in sensation and perception, the process by which the eye’s lens changes shape to focus near or far objects on the retina.
sensorimotor stage
the stage (from birth to nearly 2 years of age) at 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.
- Think covering a kids toy and the kid not knowing its still there
preoperational stage
the stage (from about 2 to 6 or 7 years of age) at 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.
- Same amount of liquid in 2 cups
- if one is higher then the other, kids will assume the higher one has more liquid.
egocentrism
in Piaget’s theory, the preoperational child’s difficulty taking another’s point of view.
theory of mind
the fear of strangers that infants commonly display, beginning by about 8 months of age.
stranger anxiety
the fear of strangers that infants commonly display, beginning by about 8 months of age.
concrete operational stage
in Piaget’s theory, the stage of cognitive development (from about 7 to 11 years of age) at 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 (normally beginning about age 12) at which people begin to think logically about abstract concepts.
attachment
an emotional tie with others; shown in young children by their seeking closeness to caregivers and showing distress on separation.
self-concept
all our thoughts and feelings about ourselves, in answer to the question, “Who am I?”