A Rat Is in an Operant Chamber and Learns That

Multiple Choice

A rat is in an operant chamber and learns that a pellet of food will be delivered only when a bar is pressed following the sounding of a high-pitched tone. In this example, the _____ would be considered the discriminative stimulus.

A) bar being pressed
B) the pellet of food
C) the sounding of the tone
D) All the answers are correct.