Abstract
Four rats were conditioned on a multiple schedule, in which different composite stimuli were associated with extinction and a variable-interval reinforcement schedule. The composite extinction stimulus consisted of light plus tone. The composite stimuli associated with reinforcement were light plus silence and tone plus darkness. After response rate had stabilized, three test intervals were presented to a S in each session. During two of the test intervals the composite stimuli were the same as the stimuli associated with reinforcement. During the third test interval the composite stimulus was darkness plus silence. Response rate was highest during the third test interval, and this rate difference was maintained for 60 sessions.
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Meltzer, D., Freeman, B.J. Maintenance of response summation under conditions of minimum stimulus intensity. Psychon Sci 22, 287–289 (1971). https://doi.org/10.3758/BF03335959
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DOI: https://doi.org/10.3758/BF03335959