The S+/S- discrimination-learning experiments with Sniffy involve each of the following EXCEPT
a. the use of CRF rather than PRF schedules.
b. alternating S+ and S- periods each lasting 1 minute.
c. the alternating presence of reinforcement and extinction.
d. the presentation of a 2.0 kHz tone during S+ and no tone during S-.
d. the presentation of a 2.0 kHz tone during S+ and no tone during S-.
Answer feedback: The experimental design for the S+/S- discrimination-learning experiments involves the use of two tones—one as the S+ (2.0 kHz) and the other as the S- (2.25 kHz). The two alternate in 1-minute segments featuring a CRF schedule during S+ and extinction during S-.
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