The influence of passive preexposure on escape from a Morris pool

Pearce, John M. and Roberts, Amanda D. L. and Redhead, Edward S. and Prados, José (2000) The influence of passive preexposure on escape from a Morris pool. Journal of Experimental Psychology: Animal Behavior Processes, 26 (2). pp. 186-195. ISSN 0097-7403

Full content URL: http://dx.doi.org/10.1037//0097-7403.26.2.186

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The Influence of Passive Preexposure on Escape From a Morris Pool

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Abstract

In 3 experiments rats were preexposed to the landmarks that surround a Morris pool by being
placed on a submerged platform within the pool. They were then required to escape from the
pool by swimming to the platform, which was in a location that had not been used during
preexposure. Preexposure facilitated subsequent escape from the pool, provided that the
platform was not moved during preexposure and the relative position of the landmarks to each
other remained constant throughout preexposure. In contrast, if during preexposure the
platform was moved from session to session (Experiment 1), or the array of landmarks was
altered unsystematically from trial to trial (Experiments 2 and 3), then subsequent learning to
escape from the pool was disrupted. These findings suggest that the effects of preexposure to
the landmarks in a Morris pool is determined by whether or not they are of relevance for
identifying the location of the platform. When they are relevant, then subsequent learning is
facilitated, but when they are irrelevant, then subsequent learning is disrupted.

Additional Information:Accepted 16 November 1999
Keywords:Morris Pool, Salient Landmark, Latent Inhibition, Pavlovian Conditioning, Facilitated Learning
Subjects:C Biological Sciences > C120 Behavioural Biology
C Biological Sciences > C800 Psychology
C Biological Sciences > C900 Others in Biological Sciences
Divisions:College of Social Science > School of Psychology
ID Code:15849
Deposited On:30 Oct 2014 13:51

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