If a response is not followed by a reward, it will occur less frequently, according to which principle of operant conditioning?

About ______ of the people holding advanced degrees in psychology are clinicians who treat clients having emotional or mental difficulties

a. one-fifth b. one-fourth c. one-third d. one-half

Basic emotions are

A) difficult to identify in the first few months of life. B) universal in humans. C) found only among humans. D) reflexive.