Which of these research methods would a behavioural 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 mental health issues
C)administering paper-and-pencil or computerized questionnaires to hundreds of people
D)examining the changes in the expression of the genetic code over the lifespan

Question

Quizplus · Accepted Answer

Behavioural geneticists often use twin and adoption studies to estimate the heritability of personality traits. This involves examining whether monozygotic (identical) twins, who share 100% of their genes, are more similar in personality traits compared to dizygotic (fraternal) twins or adoptive siblings, who share only 50% of their genes. By comparing the correlations in personality scores between different types of siblings, researchers can estimate the relative contributions of genetics and environment to personality differences.

Which of These Research Methods Would a Behavioural Geneticist Be