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