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Research article summary:
The impact of reinforcement density on response differentiation in configural discrimination problems.
Abstract Extract:
Two human Pavlovian conditioning experiments investigated the impact of reinforcement density (the number of reinforced trials divided by the total number of trials) on discrimination learning. Experiment 1 used a negative patterning problem (A+, B+, ... (Full abstract text below) Published 2002Sep
in Journal: Psychophysiology
(Language : eng)
Full Pubmed Extract
This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:
1. Psychophysiology.
2002 Sep;39(5):650-6
The impact of reinforcement density on response differentiation in configural discrimination problems.
Lachnit H, Lober K, Reinhard G, Giurfa M
Department of Psychology, Philipps-Universität Marburg, Germany. Lachnit@mailer.uni-marburg.de
Two human Pavlovian conditioning experiments investigated the impact of reinforcement density (the number of reinforced trials divided by the total number of trials) on discrimination learning. Experiment 1 used a negative patterning problem (A+, B+, AB-) and Experiment 2 used a positive patterning problem (A-, B-, AB+). In both experiments, reinforcement density varied across four levels. Response differentiation between reinforced and non-reinforced stimuli was linearly related to the decrease in reinforcement density. Responses to nonreinforced stimuli did not differ between the four groups in either experiment. In contrast to this, responses to reinforced stimuli were considerably more pronounced in conditions with lower reinforcement density. For negative patterning, this replicates and extends similar observations from other species. For positive patterning, this is a finding that has not yet been reported in other experiments. The results are in agreement with the comparator hypothesis (Miller & Matzel, 1988) and with Wagner's (1981) "standard operating procedures" (SOP) model.
PMID : 12236332 [PubMed - Indexed for MEDLINE]
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Full Author Information
| First Name | LastName | Initials |
| Harald | Lachnit | H |
| Klaus | Lober | K |
| Günter | Reinhard | G |
| Martin | Giurfa | M |
Affiliation: Department of Psychology, Philipps-Universität Marburg, Germany. Lachnit@mailer.uni-marburg.de
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