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| Research article summary (published 30 Mar 2009): |
Is Perruchet's dissociation between eyeblink conditioned responding and outcome expectancy evidence for two learning systems?
Full Abstract
P. Perruchet (1985b) showed a double dissociation of conditioned responses (CRs) and expectancy for an airpuff unconditioned stimulus (US) in a 50% partial reinforcement schedule in human eyeblink conditioning. In the Perruchet effect, participants show an increase in CRs and a concurrent decrease in expectancy for the airpuff across runs of reinforced trials; conversely, participants show a decrease in CRs and a concurrent increase in expectancy for the airpuff across runs of nonreinforced trials. Three eyeblink conditioning experiments investigated whether the linear trend in eyeblink CRs in the Perruchet effect is a result of changes in associative strength of the conditioned stimulus (CS), US sensitization, or learning the precise timing of the US. Experiments 1 and 2 demonstrated that the linear trend in eyeblink CRs is not the result of US sensitization. Experiment 3 showed that the linear trend in eyeblink CRs is present with both a fixed and a variable CS-US interval and so is not the result of learning the precise timing of the US. The results are difficult to reconcile with a single learning process model of associative learning in which expectancy mediates CRs. Copyright (c) 2009 APA, all rights reserved.
Author information
Author/s: Weidemann, Gabrielle (G); Tangen, Jason M (JM); Lovibond, Peter F (PF); Mitchell, Christopher J (CJ);
Affiliation: School of Psychology, University of New South Wales, Sydney, New South Wales, Australia. G.Weidemann(-atsign-)unsw.edu.au
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Journal of experimental psychology. Animal behavior processes (J Exp Psychol Anim Behav Process), published in United States. (Language: eng)
Reference: 2009-Apr; vol 35 (issue 2) : pp 169-76
Dates: Created 2009/04/14; Completed 2009/06/25;
PMID: 19364226, status: MEDLINE (last retrieval date: 6/25/2009, IMS Date: )
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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