Cargando…

The effect of gaze-contingent stimulus elimination on preference judgments

This study examined how stimulus elimination (SE) in a preference judgment task affects observers’ choices. Previous research suggests that biasing gaze toward one alternative can increase preference for it; this preference reciprocally promotes gaze bias. Shimojo et al. (2003) called this phenomeno...

Descripción completa

Detalles Bibliográficos
Autores principales: Morii, Masahiro, Sakagami, Takayuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4563161/
https://www.ncbi.nlm.nih.gov/pubmed/26441727
http://dx.doi.org/10.3389/fpsyg.2015.01351
_version_ 1782389257554362368
author Morii, Masahiro
Sakagami, Takayuki
author_facet Morii, Masahiro
Sakagami, Takayuki
author_sort Morii, Masahiro
collection PubMed
description This study examined how stimulus elimination (SE) in a preference judgment task affects observers’ choices. Previous research suggests that biasing gaze toward one alternative can increase preference for it; this preference reciprocally promotes gaze bias. Shimojo et al. (2003) called this phenomenon the Gaze Cascade Effect. They showed that the likelihood that an observer’s gaze was directed toward their chosen alternative increased steadily until the moment of choosing. Therefore, we tested whether observers would prefer an alternative at which they had been gazing last if both alternatives were removed prior to the start of this rising gaze likelihood. To test this, we used a preference judgment task and controlled stimulus presentation based on gaze using an eye-tracking system. A pair of non-sensical figures was presented on the computer screen and both stimuli were eliminated while participants were still making their preference decision. The timing of the elimination differed between two experiments. In Experiment 1, after gazing at both stimuli one or more times, stimuli were removed when the participant’s gaze fell on one alternative, pre-selected as the target stimulus. There was no significant difference in the preference of the two alternatives. In Experiment 2, we did not predefine any target stimulus. After the participant gazed at both stimuli one or more times, both stimuli were eliminated when the participant next fixated on either. The likelihood of choosing the stimulus that was gazed at last (at the moment of elimination) was greater than chance. Results showed that controlling participants’ choices using gaze-contingent SE was impossible, but the different results between these two experiments suggest that participants decided which stimulus to choose during their first period of gazing at each alternative. Thus, we could predict participants’ choices by analyzing eye movement patterns at the moment of SE.
format Online
Article
Text
id pubmed-4563161
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-45631612015-10-05 The effect of gaze-contingent stimulus elimination on preference judgments Morii, Masahiro Sakagami, Takayuki Front Psychol Psychology This study examined how stimulus elimination (SE) in a preference judgment task affects observers’ choices. Previous research suggests that biasing gaze toward one alternative can increase preference for it; this preference reciprocally promotes gaze bias. Shimojo et al. (2003) called this phenomenon the Gaze Cascade Effect. They showed that the likelihood that an observer’s gaze was directed toward their chosen alternative increased steadily until the moment of choosing. Therefore, we tested whether observers would prefer an alternative at which they had been gazing last if both alternatives were removed prior to the start of this rising gaze likelihood. To test this, we used a preference judgment task and controlled stimulus presentation based on gaze using an eye-tracking system. A pair of non-sensical figures was presented on the computer screen and both stimuli were eliminated while participants were still making their preference decision. The timing of the elimination differed between two experiments. In Experiment 1, after gazing at both stimuli one or more times, stimuli were removed when the participant’s gaze fell on one alternative, pre-selected as the target stimulus. There was no significant difference in the preference of the two alternatives. In Experiment 2, we did not predefine any target stimulus. After the participant gazed at both stimuli one or more times, both stimuli were eliminated when the participant next fixated on either. The likelihood of choosing the stimulus that was gazed at last (at the moment of elimination) was greater than chance. Results showed that controlling participants’ choices using gaze-contingent SE was impossible, but the different results between these two experiments suggest that participants decided which stimulus to choose during their first period of gazing at each alternative. Thus, we could predict participants’ choices by analyzing eye movement patterns at the moment of SE. Frontiers Media S.A. 2015-09-09 /pmc/articles/PMC4563161/ /pubmed/26441727 http://dx.doi.org/10.3389/fpsyg.2015.01351 Text en Copyright © 2015 Morii and Sakagami. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Psychology
Morii, Masahiro
Sakagami, Takayuki
The effect of gaze-contingent stimulus elimination on preference judgments
title The effect of gaze-contingent stimulus elimination on preference judgments
title_full The effect of gaze-contingent stimulus elimination on preference judgments
title_fullStr The effect of gaze-contingent stimulus elimination on preference judgments
title_full_unstemmed The effect of gaze-contingent stimulus elimination on preference judgments
title_short The effect of gaze-contingent stimulus elimination on preference judgments
title_sort effect of gaze-contingent stimulus elimination on preference judgments
topic Psychology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4563161/
https://www.ncbi.nlm.nih.gov/pubmed/26441727
http://dx.doi.org/10.3389/fpsyg.2015.01351
work_keys_str_mv AT moriimasahiro theeffectofgazecontingentstimuluseliminationonpreferencejudgments
AT sakagamitakayuki theeffectofgazecontingentstimuluseliminationonpreferencejudgments
AT moriimasahiro effectofgazecontingentstimuluseliminationonpreferencejudgments
AT sakagamitakayuki effectofgazecontingentstimuluseliminationonpreferencejudgments