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-interval
B) variable-ratio
C) variable-interval
D) fixed-ratio

Question

Quizplus · Accepted Answer

The unannounced "pop" exams indicate that the schedule of reinforcement is variable-interval, meaning that reinforcement (the exam) is delivered on an unpredictable schedule of time intervals. This is different from fixed-interval, where reinforcement is delivered on a predictable schedule of time intervals, and from fixed-ratio and variable-ratio, where reinforcement is delivered after a fixed or variable number of responses.

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