A short intertrial interval facilitates acquisition of context-conditioned fear and a short retention interval facilitates its expression

Journal of Experimental Psychology. Animal Behavior Processes
Gavan McNally, R F Westbrook

Abstract

Rats were shocked in a context on two occasions and then tested for fear reactions as indexed by freezing. Rats spent the interval between conditioning trials and between conditioning and test in their home cages. A short interval between context-conditioning trials or between trials involving a discrete conditioned stimulus (CS) produced better learning than longer intervals. A short retention interval between conditioning and test produced better performance than longer intervals. The effects of the intertrial interval on learning are the opposite of those reported previously and are opposite to those predicted by contemporary learning theories. The effects of the training to test interval on performance are predicted by Wagner's sometimes opponent process (SOP) theory (Wagner, 1981).

References

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Dec 1, 1950·Journal of Experimental Psychology·K W SPENCE, E B NORRIS
Jan 20, 2005·Journal of Experimental Psychology. Animal Behavior Processes·Richard W MorrisR Frederick Westbrook

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Citations

Oct 6, 2010·Neuroscience Letters·Leticia SmalAlejandro Delorenzi
Jun 22, 2010·Biological Reviews of the Cambridge Philosophical Society·Geoff A Parker, Tommaso Pizzari

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