When personality psychologists measure trait differences in extraversion, what kinds of direct observations are they making?

A) phenotypic
B) genotypic
C) allelic
D) genome-wide

Personality Psychologists

Psychologists who specialize in the study of personality, examining individual differences in behavior, emotion, and cognition.

Extraversion

A personality trait characterized by sociability, talkativeness, assertiveness, and high amounts of emotional expressiveness.

Phenotypic

Pertaining to the observable physical or biochemical characteristics of an organism as determined by both genetic makeup and environmental influences.