Accession Number:

AD0618850

Title:

OVERTRAINING, REVERSAL, AND EXTINCTION IN RATS AND CHICKS,

Descriptive Note:

Corporate Author:

OXFORD UNIV (ENGLAND) INST OF EXPERIMENTAL PSYCHOLOGY

Personal Author(s):

Report Date:

1964-04-17

Pagination or Media Count:

6.0

Abstract:

Overtraining facilitated reversal of a brightness discrimination in rats, but retarded reversal in chicks. 1 explanation for this difference is that the relevant brightness cue was a more dominant one for chicks, so that overtraining could not strengthen the response of attending to it. In support of this suggestion, chicks did show a significant overtraining reversal effect in a more complex orientation discrimination. 2 further experiments showed that if responses were extinguished before reversal, then the slow reversal learners nonovertrained rats in the brightness problem, nonovertrained chicks in the orientation problem, overtrained chicks in the brightness problem showed a significant increase in choice of their former S in early reversal trials. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE