Abstract
Two groups of Ss, one relatively naive (S1) and one which had first served as Es under the same experimental conditions in which they then served as Ss (S2), were run in a factorial design investigating the effects of UCS duration and percentage of reinforcement. With 100% reinforcement short duration UCS produced performance significantly superior to long UCS for both S1 and S2 Ss, supporting drive-reduction theory. Under 50% reinforcement short duration UCS was superior to long UCS only for S1 Ss, supporting Kimble’s hypothesis of an inhibitory attitudinal factor operating with naive Ss under partial reinforcement.
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References
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Meiselman, H.L., Moore, J.W. The effects of percentage reinforcement, UCS duration, and experience with procedure on the conditioned eyelid response. Psychon Sci 3, 335–336 (1965). https://doi.org/10.3758/BF03343167
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DOI: https://doi.org/10.3758/BF03343167