Performance as a function of deprivation time following periodic feeding in an isolated environment

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An experiment was run to test the prediction that periodic feeding develops associations between drive stimuli and anticipatory drive-producing responses thereby producing a curvilinear relation between performance and deprivation time. Rats living in a sound-shielded room were fed at the same time of day for 35 days. 5 subgroups were tested in their cages under deprivations of 2, 12, 22, 35, and 46 hr. The response measure, frequency of depresions of the empty food troughs, showed a gradual rise from 2 to 22 hr. and beyond, but did not decline thereafter as predicted by the theory under test. Starting and running speed scores in a straight runway also failed to support the curvilinear hypothesis. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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