The stimulus-response overshadowing phenomenon with VI versus FI schedules of reinforcement
| Autor: | Marie Midgley, Jean E. Roberts, Stephen E. G. Lea, Roger M. Tarpy |
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| Rok vydání: | 1984 |
| Předmět: |
Schedule
medicine.medical_specialty Variable interval Interval temporal logic Experimental and Cognitive Psychology Audiology Variable ratio Stimulus response Behavioral Neuroscience Neuropsychology and Physiological Psychology Salience (neuroscience) medicine Fixed interval Animal Science and Zoology Psychology Reinforcement Social psychology General Psychology |
| Zdroj: | Animal Learning & Behavior. 12:50-54 |
| ISSN: | 1532-5830 0090-4996 |
| DOI: | 10.3758/bf03199812 |
| Popis: | Previous research has shown that response rates on a variable interval (VI) schedule of reinforcement decrease if a brief response-produced signal is given prior to reward. One explanation is that the signal overshadows the response because it is a better predictor of reinforcement. The S-R overshadowing effect does not occur with variable ratio (VR) schedules, however. Tarpy, Lea, and Midgley (1983) explained this fact by suggesting that the signal functions to enhance the salience of the temporal interval offset on the VI schedule (a characteristic not possessed by VR schedules), which then overshadows the response. In this experiment, the salience of the temporal interval was enhanced in another way: signaled or unsignaled reward was provided to rats responding on either a VI or fixed interval (FI) reward schedule. As predicted, rates were lowest for animals receiving signaled reinforcement on an FI schedule and highest for those receiving unsignaled reinforcement on a VI schedule. |
| Databáze: | OpenAIRE |
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