Deepened extinction from compound stimulus presentation

Journal of Experimental Psychology. Animal Behavior Processes
Robert A Rescorla

Abstract

Three experiments with rats and 2 with pigeons explored the effect of presenting 2 extinguished excitatory stimuli in compound. Four learning situations were used: Pavlovian magazine approach, Pavlovian fear conditioning, and instrumental discriminative instrumental learning in rats, as well as Pavlovian sign tracking in pigeons. All 5 experiments confirmed D. Reberg's (1972) observation that even after extinction of the individual stimuli, presenting them in compound evoked substantial responding. Moreover, nonreinforcement of that compound deepened extinction of an element more substantially than did additional presentation of that element alone. Such compound exposure reduced spontaneous recovery, reduced reinstatement, and slowed subsequent reconditioning. The primary determinant seemed to be the enhanced associative strength rather than the enhanced conditioned responding that occurred during the nonreinforced compound.

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Citations

Dec 13, 2012·Experimental and Clinical Psychopharmacology·Brendan J TunstallDavid N Kearns
Apr 23, 2010·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Steve R MakkarJacquelyn Cranney
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