919 resultados para operant conditioning
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Mode of access: Internet.
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"ILENR/BE-87/01."
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"February 1970."
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"June 1991."
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Mode of access: Internet.
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Includes index.
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"June 1968."
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"November 1966."
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"March 1969."
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"February 1970."
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Includes bibliographical references (p. 103-147).
Summary report on air conditioning of railroad passenger cars. Chicago, Illinois, November 24, 1936.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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Previous studies of human affective learning, the acquisition of likes and dislikes, provided evidence that extinction training does not affect changes in conditional stimulus (CS) valence as indexed by paper/pencil ratings. Experiment 1 (N = 32) investigated whether this is an artifact of the CS valence assessment, which is taken in test sessions before and after training. Pleasantness ratings were collected in pre/post training tests and, for half of the participants, on-line during training. Rated unpleasantness of the CS that preceded the aversive US (CS+) increased during acquisition and decreased during extinction back to neutral. However, as in previous studies, post extinction paper/pencil ratings revealed the maintenance of rated CS+ unpleasantness. Experiment 2 (N = 34) replicated this finding for two measures of CS valence, paper/pencil and the continuous measure used during training. The present results indicate that previous reports of failures to find extinction of affective learning may reflect renewal rather than maintenance of acquired CS valence across extinction training. (C) 2003 Elsevier Science (USA). All rights reserved.