PSYB20H3 Chapter Notes - Chapter 3: Neurosis, Behavioural Genetics, Bipolar Disorder
Document Summary
Behavioral genetics: study of gene influence on behaviors: methods of studying heritability. Adoption design: measure nature vs environment: estimating the contributions of genes and environment. Researchers calculate and compare concordance rates the percentage of pairs of people in which both members of the pair displays the trait if one member has it. Measure heritability coefficient and compare: heritability estimate for iq = 0. 52. Inherited traits and environment interact together to create individual differences, which affects core dimensions of personality: e. g introversion/extroversion, empathetic concerns, etc. Heredity contributes to abnormal behaviors such as alcoholism, criminality, depression, hyperactivity, bipolar disorder, and several neurotic disorders. Theories of heredity and environment interactions in development: the canalization principle. Canalization genes limit or restrict development to a small number of outcomes. Ducking embryos exposed to chicken calls before hatching prefers the calls of chickens to those of their own mothers. There are multiple pathways that an individual might develop. Nature and nurture combine to determine these pathways.
