Abstract
Twenty-four rats received irregular 50% partial reinforcement. Half the intertrial intervals were 15 sec. and half were 5 min. For 12 Ss, consideration of both the goal event of the previous trial and length of the intertrial interval allowed reliable prediction of the goal event on the ensuing trial. The remaining 12 Ss constituted a control group. The experimental Ss ran significantly faster on reinforced than nonreinforced trials at both short and long intertrial intervals, though discrimination was poor at the longer interval.
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Capaldi, E. J. Effect of N-length, number of different N-lengths, and number of reinforcements on resistance to extinction. J. exp. Psychol., 1964, 68, 230–239.
Pavlov, I. P. Conditioned reflexes. (Trans. G. V. Anrep), New York: Dover Publications, Inc., 1960.
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This investigation was supported in part by Public Health Service Research Grant MH 10041-01 from the National Institute of Mental Health.
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Bowen, J., Strickert, D. Discrimination learning as a function of internal stimuli. Psychon Sci 5, 297 (1966). https://doi.org/10.3758/BF03328403
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DOI: https://doi.org/10.3758/BF03328403