In fixed-interval reinforcement, _____
a. rats press the lever very rapidly when reinforcements are extinguished
b. the response rate declines when the interval between reinforcements is shortened
c. the frequency of reinforcers had no effect on how quickly the responses extinguished
d. the timing of the reinforcement is unrelated to the number of responses
ANS: D
FEEDBACK: In fixed-interval reinforcement, the timing of the reinforcement has nothing to do with the number of responses. The reinforcer arrives only after the passage of a given time period and the emission of the correct response. Skinner's research showed that the shorter the interval between presentations of the reinforcer, the greater the frequency of response.
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