Which of the following statements regarding siblings and personality is true?

A) Nonshared environments affect siblings' personalities.
B) Twin studies can account for the influence of culture and generation.
C) Studies show that genetics explain about 70% of the variance in personality.
D) Birth order is solely responsible for shaping siblings' personalities.

Question

Morgan Hurlbut · Accepted Answer

Final Answer : A, Explanation :  Nonshared environments, such as different experiences and relationships, can impact siblings' personalities, even if they share the same genetics and family environment. Twin studies can only account for the influence of genetics, not culture and generation. Studies show that genetics may explain around 50% of the variance in personality, not 70%. Birth order is one factor that can influence personality but is not solely responsible for shaping siblings' personalities.

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