Discriminative stimuli that follow the absence of reinforcement are preferred by pigeons over those that follow reinforcement.

Autor: Friedrich, Andrea M., Clement, Tricia S., Zentall, Thomas R.
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Zdroj: Learning & Behavior; Aug2005, Vol. 33 Issue 3, p337-342, 6p, 2 Diagrams, 1 Graph
Abstrakt: Clement, Feltus, Kaiser, and Zentall (2000) found that when pigeons have to work to obtain a discriminative stimulus that is followed by reinforcement, they prefer a discriminative stimulus that requires greater effort over one that requires less effort. The authors suggested that such a preference results from the greater change in hedonic value that occurs between the more aversive event and the onset of the stimulus that signals reinforcement, a contrast effect. It was hypothesized that any stimulus that follows a relatively more aversive event would be preferred over a stimulus that follows a relatively less aversive event. In the present experiment, the authors tested the counterintuitive prediction of that theory, that pigeons should prefer a discriminative stimulus that follows the absence of reinforcement over a discriminative stimulus that follows reinforcement. Results supported the theory. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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