A rat is reinforced for the first lever-pressing response that occurs, on the average, after 60 seconds. Which schedule is the rat on?
A) fixed-ratio (FR)
B) variable-ratio (VR)
C) fixed-interval (FI)
D) variable-interval (VI)

Question

Quizplus · Accepted Answer

The rat is on a variable-interval (VI) schedule because reinforcement is given for the first response after an average amount of time (60 seconds) has passed, rather than after a fixed amount of time or a fixed number of responses.

A Rat Is Reinforced for the First Lever-Pressing Response That