A multiple-choice task with changes of mind.

The role of changes of mind and multiple choices has recently received increased attention in the study of perceptual decision-making. Previously, these extensions to standard two-alternative tasks have been studied separately. Here we explored how changes of mind depend on the number of choice-alte...

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Autores principales:	Larissa Albantakis, Francesca M Branzi, Albert Costa, Gustavo Deco
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7b8e18769bf64f7a968401f7bf71bfc4
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id	oai:doaj.org-article:7b8e18769bf64f7a968401f7bf71bfc4
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spelling	oai:doaj.org-article:7b8e18769bf64f7a968401f7bf71bfc42021-11-18T07:08:34ZA multiple-choice task with changes of mind.1932-620310.1371/journal.pone.0043131https://doaj.org/article/7b8e18769bf64f7a968401f7bf71bfc42012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22916216/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The role of changes of mind and multiple choices has recently received increased attention in the study of perceptual decision-making. Previously, these extensions to standard two-alternative tasks have been studied separately. Here we explored how changes of mind depend on the number of choice-alternatives. To this end, we tested 14 human subjects on a 2- and 4-alternative direction-discrimination task. Changes of mind in the participants' movement trajectories could be observed for two and for four choice alternatives. With fewer alternatives, participants responded faster and more accurately. The frequency of changes of mind, however, did not significantly differ for the different numbers of choice alternatives. Nevertheless, mind-changing improved the participants' final performance, particularly for intermediate difficulty levels, in both experimental conditions. Moreover, the mean reaction times of individual participants were negatively correlated with their overall tendency to make changes of mind. We further reproduced these findings with a multi-alternative attractor model for decision-making, while a simple race model could not account for the experimental data. Our experiment, combined with the theoretical models allowed us to shed light on: (1) the differences in choice behavior between two and four alternatives, (2) the differences between the data of our human subjects and previous monkey data, (3) individual differences between participants, and (4) the inhibitory interaction between neural representations of choice alternatives.Larissa AlbantakisFrancesca M BranziAlbert CostaGustavo DecoPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 8, p e43131 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Larissa Albantakis Francesca M Branzi Albert Costa Gustavo Deco A multiple-choice task with changes of mind.
description	The role of changes of mind and multiple choices has recently received increased attention in the study of perceptual decision-making. Previously, these extensions to standard two-alternative tasks have been studied separately. Here we explored how changes of mind depend on the number of choice-alternatives. To this end, we tested 14 human subjects on a 2- and 4-alternative direction-discrimination task. Changes of mind in the participants' movement trajectories could be observed for two and for four choice alternatives. With fewer alternatives, participants responded faster and more accurately. The frequency of changes of mind, however, did not significantly differ for the different numbers of choice alternatives. Nevertheless, mind-changing improved the participants' final performance, particularly for intermediate difficulty levels, in both experimental conditions. Moreover, the mean reaction times of individual participants were negatively correlated with their overall tendency to make changes of mind. We further reproduced these findings with a multi-alternative attractor model for decision-making, while a simple race model could not account for the experimental data. Our experiment, combined with the theoretical models allowed us to shed light on: (1) the differences in choice behavior between two and four alternatives, (2) the differences between the data of our human subjects and previous monkey data, (3) individual differences between participants, and (4) the inhibitory interaction between neural representations of choice alternatives.
format	article
author	Larissa Albantakis Francesca M Branzi Albert Costa Gustavo Deco
author_facet	Larissa Albantakis Francesca M Branzi Albert Costa Gustavo Deco
author_sort	Larissa Albantakis
title	A multiple-choice task with changes of mind.
title_short	A multiple-choice task with changes of mind.
title_full	A multiple-choice task with changes of mind.
title_fullStr	A multiple-choice task with changes of mind.
title_full_unstemmed	A multiple-choice task with changes of mind.
title_sort	multiple-choice task with changes of mind.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/7b8e18769bf64f7a968401f7bf71bfc4
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A multiple-choice task with changes of mind.

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