Research article summary (published 30 Jul 2009):

Representations of single and compound stimuli in negative and positive patterning.

Full Abstract

In four experiments, rats were trained on different patterning discriminations before being tested with compounds composed of novel combinations of the trained stimuli. In Experiment 1, rats were trained on a negative-patterning schedule (A+ B+ AB-) intermixed with reinforced presentations of a second compound (CD+). On a subsequent test, the rats responded more to two novel compounds, AC and BD, than to A and B, but less than to CD. In Experiment 2, rats were trained on two concurrent negative-patterning discriminations (A+ B+ AB-, C+ D+ CD-). On test, they responded more to AC and BD than to AB and CD, but less than to the single stimuli. In Experiment 3, rats were trained on two concurrent positive-patterning discriminations (A- B- AB+, C- D- CD+). On test, their response rates to AC and BD were not different from the response rates to the trained compounds (AB and CD). Finally, in Experiment 4, rats were trained on a positive- and negative-patterning discrimination concurrently. Once again, on test, response rates to AC and BD were not different from responding on reinforced trials of the trained discriminations (A+, B+, and CD+). We discuss the implications of these findings for elemental and configural models of stimulus representation.

Author information

Author/s: Harris, Justin A (JA); Gharaei, Saba (S); Moore, Clinton A (CA);

Affiliation: School of Psychology, University of Sydney, Sydney, New South Wales, Australia. justinh(-atsign-)psych.usyd.edu.au

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Learning & behavior : a Psychonomic Society publication (Learn Behav), published in United States. (Language: eng)

Reference: 2009-Aug; vol 37 (issue 3) : pp 230-45

Dates: Created 2009/06/22; Completed 2009/08/21;

PMID: 19542090, status: MEDLINE (last retrieval date: 8/21/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Animals Association Learning Auditory Perception Conditioning, Operant Female Inhibition (Psychology) Male

Male Motivation Orientation Rats Rats, Wistar Reversal Learning Visual Perception

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