Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model

Abstract Rafiei and Rahnev (2021) presented an analysis of an experiment in which they manipulated speed-accuracy stress and stimulus contrast in an orientation discrimination task. They argued that the standard diffusion model could not account for the patterns of data their experiment produced. Ho...

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Autores principales:	Roger Ratcliff, Inhan Kang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/38df7b598987437cac6a221db4d4bd39
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spelling	oai:doaj.org-article:38df7b598987437cac6a221db4d4bd392021-12-02T16:31:51ZQualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model10.1038/s41598-021-94451-72045-2322https://doaj.org/article/38df7b598987437cac6a221db4d4bd392021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94451-7https://doaj.org/toc/2045-2322Abstract Rafiei and Rahnev (2021) presented an analysis of an experiment in which they manipulated speed-accuracy stress and stimulus contrast in an orientation discrimination task. They argued that the standard diffusion model could not account for the patterns of data their experiment produced. However, their experiment encouraged and produced fast guesses in the higher speed-stress conditions. These fast guesses are responses with chance accuracy and response times (RTs) less than 300 ms. We developed a simple mixture model in which fast guesses were represented by a simple normal distribution with fixed mean and standard deviation and other responses by the standard diffusion process. The model fit the whole pattern of accuracy and RTs as a function of speed/accuracy stress and stimulus contrast, including the sometimes bimodal shapes of RT distributions. In the model, speed-accuracy stress affected some model parameters while stimulus contrast affected a different one showing selective influence. Rafiei and Rahnev’s failure to fit the diffusion model was the result of driving subjects to fast guess in their experiment.Roger RatcliffInhan KangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Roger Ratcliff Inhan Kang Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
description	Abstract Rafiei and Rahnev (2021) presented an analysis of an experiment in which they manipulated speed-accuracy stress and stimulus contrast in an orientation discrimination task. They argued that the standard diffusion model could not account for the patterns of data their experiment produced. However, their experiment encouraged and produced fast guesses in the higher speed-stress conditions. These fast guesses are responses with chance accuracy and response times (RTs) less than 300 ms. We developed a simple mixture model in which fast guesses were represented by a simple normal distribution with fixed mean and standard deviation and other responses by the standard diffusion process. The model fit the whole pattern of accuracy and RTs as a function of speed/accuracy stress and stimulus contrast, including the sometimes bimodal shapes of RT distributions. In the model, speed-accuracy stress affected some model parameters while stimulus contrast affected a different one showing selective influence. Rafiei and Rahnev’s failure to fit the diffusion model was the result of driving subjects to fast guess in their experiment.
format	article
author	Roger Ratcliff Inhan Kang
author_facet	Roger Ratcliff Inhan Kang
author_sort	Roger Ratcliff
title	Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
title_short	Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
title_full	Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
title_fullStr	Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
title_full_unstemmed	Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
title_sort	qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/38df7b598987437cac6a221db4d4bd39
work_keys_str_mv	AT rogerratcliff qualitativespeedaccuracytradeoffeffectscanbeexplainedbyadiffusionfastguessmixturemodel AT inhankang qualitativespeedaccuracytradeoffeffectscanbeexplainedbyadiffusionfastguessmixturemodel
_version_	1718383803156660224

Qualitative speed-accuracy tradeoff effects can be explained by a diffusion/fast-guess mixture model

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