Lila doesn't like her psychology class because the instructor uses unannounced pop exams to test the class. As a result, she never knows when she will be tested. Her instructor is testing her on a ________ schedule.
A) fixed-ratio
B) fixed-interval
C) variable-ratio
D) variable-interval

Question

Quizplus · Accepted Answer

The instructor is using a variable-interval schedule because the testing periods are unpredictable and occur at varying intervals of time.

Lila Doesn't Like Her Psychology Class Because the Instructor Uses