Abstract
Following training on an easy size discrimination, pigeons were matched on the basis of stimulus control by the positive stimulus following generalization tests. Three Ss were immediately retrained on a more difficult discrimination along the same dimension, while the remaining three Ss were retrained after a 6-month delay. The 6-month-delay group took longer to learn the more difficult discrimination and displayed less stimulus control on a subsequent generalization test.
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This research was supported at the Learning Research and Development Center by OE Contract No. 410158.
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Wildemann, D.G., Holland, J.G. The effects of delay and difficulty on discrimination learning and stimulus generalization. Psychon Sci 22, 307–308 (1971). https://doi.org/10.3758/BF03335969
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DOI: https://doi.org/10.3758/BF03335969