PSYC 3404 Lecture 2: 1/18/19 developmental
27 Jan 2019
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Document Summary
Genes and the prenatal environment provided by the biological mother could influence development. May underestimate the effects of the full range of environments. Studies are often done with similar people so the population is. Include pairs of siblings who have a variety of different degrees of genetic similarity. Measure qualities of family members" experiences to determine similarities and differences in sibling"s environments. Siblings had different environments unless siblings were twins. Percentage of pairs of people studied in which one member of a pair displays the trait, the other does too. If the rates are higher for more genetically related, then the trait is heritable. Contributions of three factors to individual differences. Household with the same income, school, etc. Experiences unique to the individual, not shared by others in the family. Correlations from a twin study of the heritability of anger. Values higher in identical twins that fraternal twins. Genetics play a large role in expressing anger.
