Question

A personality psychologist designs an experiment in which she plans to use the twin-study method. the psychologist probably is conducting research to examine the

Answer 1

The psychologist is probably conducting research to examine the influence of genetics on personality.
If she is using twins as the basis for her experiment, it will be easy for her to see how much genetics can influence personality. Twins are the best example here because their genetics is the same but their personality doesn't have to be.