Abstract
Following 10 sessions of keypeck training on a VI 120-sec reinforcement schedule, 24 pigeons were placed into one of three groups for subsequent discrimination training on a multiple VI-EXT schedule. The discriminative stimuli (two hues) alternated every 10 sec (10-sec group) or every 3 min (3-min group) during each 30-min session. The third group received one 15-min exposure of S+ and one 15-min exposure of S-per session (15-min group). Discrimination performance of these groups was best for the 10-sec group and worst for the 15-min group. The 10-sec group demonstrated higher S+ rates, while the 15-min group had the highest S− response rates.
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This investigation was supported by National Science Foundation College Science Improvement Program Grant GY-6887.
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Dickson, J.F., Zuehlke, T.E. Discrimination learning and behavioral contrast as a function of component duration. Bull. Psychon. Soc. 2, 268–270 (1973). https://doi.org/10.3758/BF03329267
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DOI: https://doi.org/10.3758/BF03329267