"Pseudoconditioned" jaw movements of the rabbit reflect associations conditioned to contextual background cues.

Journal of Experimental Psychology. Animal Behavior Processes
P J Sheafor

Abstract

Two experiments employing 180 rabbits and involving tone conditioned stimuli (CSs) and intraoral water unconditioned stimuli (UCSs) investigated pseudoconditioning of jaw movement. CS-alone, UCS-alone, paired CS-UCS, and four explicitly unpaired CS-UCS treatments were compared to no stimulus presentation. UCS-alone presentations were sufficient to produce pseudo-CR (conditioned response) acquisition. Pseudo-CRs were retained and gradually extinguished over 30 days of CS-alone presentations. Random sequences of unpaired CSc and UCSs produced higher pseudo-CR frequencies than fixed sequences. A pseudo-CR partial reinforcement extinction effect was observed. Background extinction, that is, simply confining the subject in the experimental environment without stimulation, was effective in extinguishing both pseudo-CRs and CRs. Pseudo-CR results could not be attributed to CS-UCS trace conditioning, sensory preconditioning, second-order conditioning, or intra-analyzer conditioning. Results indicate that the associative mechanisms underlying pseudoconditioning phenomena involve conditioning of associations to contextual background (apparatus, trace, temporal, and sequential aftereffect) cues by UCS-alone and unpaired UCS presentations.

Citations

Jun 1, 1993·Physiology & Behavior·J H Maes, J M Vossen
May 1, 1982·Journal of the Experimental Analysis of Behavior·G Buzsáki
Jun 26, 2015·Physiological Reviews·Wolfram Schultz
May 26, 2010·The European Journal of Neuroscience·Wolfram Schultz
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Mar 24, 2020·Neural Networks : the Official Journal of the International Neural Network Society·Minryung R Song, Sang Wan Lee

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