A personality psychologist designs an experiment in which she plans to use the twin-study method. The psychologist is probably conducting research to examine the
A) stability of temperament over time.
B) influence of genetics on personality.
C) influence of siblings on personality.
D) effects of birth order on personality.

Question

Quizplus · Accepted Answer

The twin-study method is commonly used to study the influence of genetics on personality. By comparing the similarities and differences in personality traits between identical twins, who share 100% of their genetic material, and fraternal twins, who share only 50% of their genetic material, researchers can estimate the heritability or genetic contribution to personality traits.

A Personality Psychologist Designs an Experiment in Which She Plans