Abstract
Two pigeons were trained on a three-ply multiple schedule in which reinforcement was available on a VI 1-min schedule for two of the components and extinction was in effect for the third component. SDs associated with reinforcement were either a tone or a light and the S△ associated with the extinction component was the absence of tone and light. After response rates stabilized, testing for summation was conducted with both steady-state and extinction test procedures. Both of these procedures involved 1-min presentations of the compound tone and light. Results indicate that summation did not emerge under the steady-state test conditions but did emerge under extinction test conditions.
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Long, C.K., Allen, J.D. Stimulus compounding in pigeons. Bull. Psychon. Soc. 4, 95–97 (1974). https://doi.org/10.3758/BF03334207
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DOI: https://doi.org/10.3758/BF03334207