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Title: Rapid Acquisition of Preference in Concurrent Chains When Alternatives Differ on Multiple Dimensions of Reinforcement
Contributor(s): Kyonka, Elizabeth  (author)orcid ; Grace, Randolph C (author)
Publication Date: 2008
Open Access: Yes
DOI: 10.1901/jeab.2008.89-49Open Access Link
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Abstract: Pigeons responded in a concurrent-chains procedure in which terminal-link reinforcer variables were changed unpredictably across sessions. In Experiment 1, the terminal-link schedules were fixed-interval (FI) 8 s and FI 16 s, and the reinforcer magnitudes were 2 s and 4 s. In Experiment 2 the probability of reinforcement (100% or 50%) was varied with immediacy and magnitude. Multiple-regression analyses showed that pigeons' initial-link response allocation was determined by current-session reinforcer variables, similar to previous studies which have varied only immediacy (Grace, Bragason, & McLean, 2003). Sensitivity coefficients were positive and statistically significant for all reinforcer variables in both experiments. Analyses of responding within individual sessions showed that final levels of preference for dominated sessions, in which all reinforcer variables favored the same terminal link, were more extreme than for tradeoff sessions in which at least one reinforcer variable favored each alternative. This result implies that response allocation was determined by multiple reinforcer variables within individual sessions, consistent with the concatenated matching law. However, in Experiment 2, there was a nonlinear (sigmoidal) relationship between response allocation and relative value, which suggests the possibility that reinforcer variables may interact during acquisition, contrary to the matching law.
Publication Type: Journal Article
Source of Publication: Journal of the Experimental Analysis of Behavior, 89(1), p. 49-69
Publisher: Wiley-Blackwell Publishing Inc
Place of Publication: United States of America
ISSN: 0022-5002
Field of Research (FOR): 170202 Decision Making
060801 Animal Behaviour
Socio-Economic Objective (SEO): 970117 Expanding Knowledge in Psychology and Cognitive Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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Appears in Collections:Journal Article
School of Psychology

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