Hunger, deprivation, and the day-night cycle

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“Six groups of white rats were taught to secure their food by performing a lever-pressing response, and were then subjected to a single deprivation of 2, 4, 8, 12, 18, or 24 hrs. The deprivation was begun at 7 P.M. and was accomplished by removing the lever from the apparatus. Subsequent 24-hr. measures of food intake reveal that the normal cyclic differences in rate of intake are clearly apparent in the behavior following deprivation, and may counteract the expected increase in intake normally produced by deprivation.” From Psyc Abstracts 36:01:1EF29B. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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