Which of these research methods would a behavioral geneticist be likely to employ to study the influence of genetics on personality?
A) examining heritability in twins and adopted individuals
B) interviewing people who have known others who were particularly odd or unique
C) administering paper and pencil or computerized questionnaires to hundreds of people
D) documenting the patterns of development and difficulties of psychiatric patients
Answer: A
Rationale: Behavioral genetic methods applied to humans typically involving comparing people of different levels of relatedness, such as parents and their offspring, siblings, and unrelated individuals, and measuring resemblances for a specific trait of interest. Twins and adopted children present particularly important ways of studying heredity.
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