NDLI: Pre-exposure enhances recovery of conditioned responding after extinction

Content Provider	Springer Nature Link
Author	Rosenberg, Hannah Holmes, Nathan M. Harris, Justin A. Westbrook, R. Frederick
Copyright Year	2011
Abstract	Four experiments used a within-subjects design with rats to study the effects of preexposure on the restoration of fear responses (freezing) to an extinguished conditioned stimulus (CS). In each experiment, rats were preexposed to one CS (A), but not to another (B), and then were exposed to pairings of each of these CSs with an aversive unconditioned stimulus (US). In each experiment, there was less freezing to A than to B across extinction, showing a latent inhibitory effect of preexposure. There was no differential recovery to A and B following either a US reexposure (Experiment 1) or a delay interval (Experiment 2). However, when a delay interval included US reexposure, there was greater recovery to the preexposed CS, A, than to the nonpreexposed CS, B (Experiments 1, 3, and 4). These results suggest that the effects of US reexposure and delay combine to affect recovery from the depressive effects of CS-alone exposure. The results are consistent with the view that US reexposure produces better mediated conditioning of CSs that are strongly associated with the context. The results may additionally reflect an effect of preexposure on the learning produced by extinction.
Starting Page	212
Ending Page	223
Page Count	12
File Format	PDF
ISSN	15434494
Journal	Learning & Behavior
Volume Number	39
Issue Number	3
e-ISSN	15434508
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-15
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pavlovian conditioning Pre-exposure Latent inhibition Extinction Rats Neurosciences Psychology
Content Type	Text
Resource Type	Article
Subject	Experimental and Cognitive Psychology Cognitive Neuroscience Behavioral Neuroscience

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