Abstract
Long Evans rats obtained a high frequency of reinforcement during initial exposure to a schedule which reinforced only responses spaced by at least 10 sec (DRL 10) provided this schedule was part of a two lever concurrent Fixed Ratio-DRL 10 schedule on which (1) the animal had received Fixed Ratio pretraining and (2) the animal needed 10 or more sec to complete the ratio requirement. Subsequent removal of the ratio lever resulted in marked disruption of spaced responding, although removal of Fixed Ratio reinforcement did not affect spaced responding.
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1. From Bureau of Medicine and Surgery, Navy Department, Research Task MPO22.01.03-1002. The opinions and statements contained herein are the private ones of the writers and are not to be construed as official or as reflecting the views of the Navy Department or the Naval Service at large.
2. The experiments reported herein were conducted according to the principles enunciated in “Guide for Laboratory Animal Facilities and Care” prepared by the Committee on the Guide for Laboratory Animal Resources, National Academy of Sciences-National Research Council.
3. Our thanks to Evelyn E. Lett for running Ss in Experiment III. Our thanks also to T. Daryl Hawkins and Mary E. Wheeler for critical reviews of an earlier draft of this manuscript.
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Davis, H., Wheeler, L. The collateral pretraining of spaced responding. Psychon Sci 8, 281–282 (1967). https://doi.org/10.3758/BF03331662
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DOI: https://doi.org/10.3758/BF03331662