Abstract
The patterns of drinking by 3 food-deprived rats were observed in 40 experimental sessions in which food reinforcement was scheduled at fixed intervals of 4 min (FI-4) and 1 min (FI-1) for 20 sessions each. Under the FI-1 schedule, water intake increased in amount over the 20 sessions, and induced drinking became stereotyped in frequency, magnitude, and latency within and between sessions. Under the FI-4 schedule, drinks occurred infrequently, with long and variable latencies and magnitudes, and water intake did not increase with training. We concluded that, under the FI-4 schedule, drinking was normal, not induced, and that the fluid intake responsible for the well-known bitonic relationship between interreinforcement interval and water consumption represents different proportions of induced and noninduced drinks at different intervals.
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This research was supported by a scholarship from the National Science and Engineering Research Council of Canada to Emoke Jozsvai and supplementary minor research grants from Atkinson College, York University. We are grateful to Kirk Shorting for help with the data collection and to Alexander Marr for help with the computer program.
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Keehn, J.D., Jozsvai, E. Induced and noninduced patterns of drinking by food-deprived rats. Bull. Psychon. Soc. 27, 157–159 (1989). https://doi.org/10.3758/BF03329927
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DOI: https://doi.org/10.3758/BF03329927