Author Question: Family and twin research studies have shown that personality disorders and traits A) are solely ... (Read 130 times)

Beheh · **on:** Jun 22, 2018

Family and twin research studies have shown that personality disorders and traits

A) are solely caused by environmental factors.
B) run in families and are influenced primarily by genetic factors.
C) are the result of a single gene being responsible for the development of a single trait.
D) are the result of some unknown outside variable that has yet to be discovered.

Question 2

Structural brain abnormalities have been found in both anorexia and bulimia nervosa patients; however, there is no research evidence that these differences were present before the onset of the illness.

Indicate whether the statement is true or false