Additional exposures reverse the latent inhibitory effects of recent and remote exposures

Orit Holtzman, Joyce Siette, Nathan M. Holmes, R. Frederick Westbrook*

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We studied the learning produced by simple exposures to a stimulus. Exposures depressed orienting and subsequent conditioned freezing in rats. A remotely preexposed conditioned stimulus (CS) conditioned better and overshadowed a novel CS more than a recently preexposed CS. Additional preexposures reversed these effects: a remotely preexposed CS elicited more orienting, conditioned worse and overshadowed less than a recently preexposed CS. Exposure to a compound composed of a novel CS and a remotely preexposed CS resulted in the novel CS subsequently conditioning better than a novel CS exposed in compound with a recently preexposed CS. The results were interpreted to mean that stimulus-alone exposures produce a loss in associability which recovers across time, that this restoration deepens the loss in associability, and that this deepening is regulated by a common error term.

Original languageEnglish
Pages (from-to)368-380
Number of pages13
JournalJournal of Experimental Psychology: Animal Behavior Processes
Volume36
Issue number3
DOIs
Publication statusPublished - Jul 2010
Externally publishedYes

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