For the last 30 years, Duane Rumbaugh and Sue Savage-Rumbaugh have taught a chimp named Kanzi to communicate using

According to your authors, ________ is the most critical defense mechanism in psychoanalytic theory.

Fill in the blank(s) with the appropriate word(s).

Susan trained her rat to press a bar in a Skinner box in order to get a food pellet

Susan's rat pressed the bar a lot. However, later when Susan ran out of food pellets, her rat eventually stopped pressing the bar. What had happened? a) conditioned aversion b) satiation c) extinction d) withdrawal