A Variable-Interval Schedule Is a Schedule

Multiple Choice

A variable-interval schedule is a schedule:

A) by which reinforcement is given only after a specific number of responses are made.
B) by which reinforcement occurs after a varying number of responses rather than after a fixed number.
C) that provides reinforcement for a response only if a fixed time period has elapsed,making overall rates of response relatively low.
D) by which the time between reinforcements fluctuates around some average rather than being fixed.