Deprivation and reinforcement.

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Abstract
"The relations between initial and terminal rate of bar pressing and concentration, volume per reinforcement, and interval between reinforcements, were explored as functions of deprivation. The slopes of the initial rate-concentration and initial rate-interval functions were functions of deprivation while the initial rate-volume function was not. The rate of 'shutoff' was most sensitive to deprivation at large concentrations, large volumes, and short intervals. Three independent loci of events controlling food ingestive behavior were suggested: the proximal reinforcing stimuli, the momentary post-ingestive load, and the nutritive state." (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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