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Similarity and number of alternatives in the random-dot motion paradigm
The popular random-dot motion (RDM) task has recently been applied to multiple-choice perceptual decision-making. However, changes in the number of alternatives on an RDM display lead to changes in the similarity between the alternatives, complicating the study of multiple-choice effects. To disenta...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer-Verlag
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3310993/ https://www.ncbi.nlm.nih.gov/pubmed/22287207 http://dx.doi.org/10.3758/s13414-011-0267-7 |
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author | van Maanen, Leendert Grasman, Raoul P. P. P. Forstmann, Birte U. Keuken, Max C. Brown, Scott D. Wagenmakers, Eric-Jan |
author_facet | van Maanen, Leendert Grasman, Raoul P. P. P. Forstmann, Birte U. Keuken, Max C. Brown, Scott D. Wagenmakers, Eric-Jan |
author_sort | van Maanen, Leendert |
collection | PubMed |
description | The popular random-dot motion (RDM) task has recently been applied to multiple-choice perceptual decision-making. However, changes in the number of alternatives on an RDM display lead to changes in the similarity between the alternatives, complicating the study of multiple-choice effects. To disentangle the effects of similarity and number of alternatives, we analyzed behavior in the RDM task using an optimal-observer model. The model applies Bayesian principles to give an account of how changes in the stimulus influence the decision-making process. A possible neural implementation of the optimal-observer model is discussed, and we provide behavioral data that support the model. We verify the predictions from the optimal-observer model by fitting a descriptive model of choice behavior (the linear ballistic accumulator model) to the behavioral data. The results show that (a) there is a natural interaction in the RDM task between similarity and the number of alternatives; (b) the number of alternatives influences “response caution”, whereas the similarity between the alternatives influences “drift rate”; and (c) decisions in the RDM task are near optimal when participants are presented with multiple alternatives. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.3758/s13414-011-0267-7) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-3310993 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Springer-Verlag |
record_format | MEDLINE/PubMed |
spelling | pubmed-33109932012-03-27 Similarity and number of alternatives in the random-dot motion paradigm van Maanen, Leendert Grasman, Raoul P. P. P. Forstmann, Birte U. Keuken, Max C. Brown, Scott D. Wagenmakers, Eric-Jan Atten Percept Psychophys Article The popular random-dot motion (RDM) task has recently been applied to multiple-choice perceptual decision-making. However, changes in the number of alternatives on an RDM display lead to changes in the similarity between the alternatives, complicating the study of multiple-choice effects. To disentangle the effects of similarity and number of alternatives, we analyzed behavior in the RDM task using an optimal-observer model. The model applies Bayesian principles to give an account of how changes in the stimulus influence the decision-making process. A possible neural implementation of the optimal-observer model is discussed, and we provide behavioral data that support the model. We verify the predictions from the optimal-observer model by fitting a descriptive model of choice behavior (the linear ballistic accumulator model) to the behavioral data. The results show that (a) there is a natural interaction in the RDM task between similarity and the number of alternatives; (b) the number of alternatives influences “response caution”, whereas the similarity between the alternatives influences “drift rate”; and (c) decisions in the RDM task are near optimal when participants are presented with multiple alternatives. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.3758/s13414-011-0267-7) contains supplementary material, which is available to authorized users. Springer-Verlag 2012-01-28 2012 /pmc/articles/PMC3310993/ /pubmed/22287207 http://dx.doi.org/10.3758/s13414-011-0267-7 Text en © The Author(s) 2012 https://creativecommons.org/licenses/by-nc/4.0/ This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited. |
spellingShingle | Article van Maanen, Leendert Grasman, Raoul P. P. P. Forstmann, Birte U. Keuken, Max C. Brown, Scott D. Wagenmakers, Eric-Jan Similarity and number of alternatives in the random-dot motion paradigm |
title | Similarity and number of alternatives in the random-dot motion paradigm |
title_full | Similarity and number of alternatives in the random-dot motion paradigm |
title_fullStr | Similarity and number of alternatives in the random-dot motion paradigm |
title_full_unstemmed | Similarity and number of alternatives in the random-dot motion paradigm |
title_short | Similarity and number of alternatives in the random-dot motion paradigm |
title_sort | similarity and number of alternatives in the random-dot motion paradigm |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3310993/ https://www.ncbi.nlm.nih.gov/pubmed/22287207 http://dx.doi.org/10.3758/s13414-011-0267-7 |
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