posted by karl .
Psychologists are interested in people's behavior and their mental processes. Psychologists believe that:
behavior is impacted by environment, but not by a person's physical state.
behavior is affected by a person's mental and physical state, but rarely by his or her environment.
a person's physical state, mental state, and the empirical evidence impact his or her behavior.
a person's physical state, mental state, and environment influence his or her behavior.