Relative reinforcer rates and magnitudes do not control concurrent choice independently

Show simple item record Elliffe, Douglas en Davison, Michael en Landon, Jason en 2012-03-06T23:36:41Z en 2008 en
dc.identifier.citation J Exp Anal Behav 90(2):169-185 Sep 2008 en
dc.identifier.issn 0022-5002 en
dc.identifier.uri en
dc.description.abstract One assumption of the matching approach to choice is that different independent variables control choice independently of each other. We tested this assumption for reinforcer rate and magnitude in an extensive parametric experiment. Five pigeons responded for food reinforcement on switching-key concurrent variable-interval variable-interval schedules. Across conditions, the ratios of reinforcer rates and of reinforcer magnitudes on the two alternatives were both manipulated. Control by each independent variable, as measured by generalized-matching sensitivity, changed significantly with the ratio of the other independent variable. Analyses taking the model-comparison approach, which weighs improvement in goodness-of-fit against increasing number of free parameters, were inconclusive. These analyses compared a model assuming constant sensitivity to magnitude across all reinforcer-rate ratios with two alternative models. One of those alternatives allowed sensitivity to magnitude to vary freely across reinforcer-rate ratios, and was less efficient than the common-sensitivity model for all pigeons, according to the Schwarz-Bayes information criterion. The second alternative model constrained sensitivity to magnitude to be equal for pairs of reinforcer-rate ratios that deviated from unity by proportionately equal amounts but in opposite directions. This model was more efficient than the common-magnitude-sensitivity model for 2 of the pigeons, but not for the other 3. An analysis of variance, carried out independently of the generalized-matching analysis, also showed a significant interaction between the effects of reinforcer rate and reinforcer magnitude on choice. On balance, these results suggest that the assumption of independence inherent in the matching approach cannot be maintained. Relative reinforcer rates and magnitudes do not control choice independently. en
dc.publisher Society for the Experimental Analysis of Behavior, Inc. en
dc.relation.ispartofseries Journal of the Experimental Analysis of Behavior en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.title Relative reinforcer rates and magnitudes do not control concurrent choice independently en
dc.type Journal Article en
dc.identifier.doi 10.1901/jeab.2008.90-169 en
pubs.issue 2 en
pubs.begin-page 169 en
pubs.volume 90 en
dc.rights.holder Copyright: Society for the Experimental Analysis of Behavior, Inc. en
dc.identifier.pmid 18831124 en
pubs.end-page 185 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 78554 en Science en Science Admin en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 18831124 en

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