| Autor: |
Scheuer, Cynthia, Sutton, Cary |
| Zdroj: |
Animal Learning & Behavior; 1973, Vol. 1 Issue 3, p193-197, 5p |
| Abstrakt: |
Resistance to extinction of discriminated barpress avoidance in rats was assessed through the use of three procedures, each of which served to break the response-reinforcement contingency, classical extinction (CE), operant extinction (OE), and a variable-ratio shock schedule (VR). Greatest resistance to extinction was found for the VR group, followed by OE and then by CE Ss. thus supporting a discriminative rather than a motivational analysis. Reacquisition rates following extinction suggested evidence of 'learned helplessness' in some Ss exposed to noncontingent CS-US presentations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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