Abstract
Discrete trials were introduced into discriminated lever-press avoidance learning in rats by employing a retractable lever. The effects of CS-UCS and inter-trial (ITI) intervals were investigated using both retractable and non-retractable levers. The retractable lever groups outperformed the non-retractable lever groups by a highly significant margin early in training but this difference disappeared within 150 trials. Similarly, ITI and CS-UCS intervals affected performance only in the first 100 trials.
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1. Research supported by NIH Grant MH-11180-01 to Michael Cole and by NSF Grant GB-3626 to Edmund Fantino.
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Cole, M., Fantino, E. Temporal variables and trial discreteness in lever-press avoidance. Psychon Sci 6, 217–218 (1966). https://doi.org/10.3758/BF03328035
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DOI: https://doi.org/10.3758/BF03328035