Viewed touch influences tactile detection by altering decision criterion

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Author(s)Nair, Anupama
Author(s)Medina, Jared
Date Accessioned2024-11-08T16:49:02Z
Date Available2024-11-08T16:49:02Z
Publication Date2024-11-05
DescriptionThis article was originally published in Attention, Perception, & Psychophysics. The version of record is available at: https://doi.org/10.3758/s13414-024-02959-7. © The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
AbstractOur tactile perception is shaped not only by somatosensory input but also by visual information. Prior research on the effect of viewing touch on tactile processing has found higher tactile detection rates when paired with viewed touch versus a control visual stimulus. Therefore, some have proposed a vicarious tactile system that activates somatosensory areas when viewing touch, resulting in enhanced tactile perception. However, we propose an alternative explanation: Viewing touch makes the observer more liberal in their decision to report a tactile stimulus relative to not viewing touch, also resulting in higher tactile detection rates. To disambiguate between the two explanations, we examined the effect of viewed touch on tactile sensitivity and decision criterion using signal detection theory. In three experiments, participants engaged in a tactile detection task while viewing a hand being touched or approached by a finger, a red dot, or no stimulus. We found that viewing touch led to a consistent, liberal criterion shift but inconsistent enhancement in tactile sensitivity relative to not viewing touch. Moreover, observing a finger approach the hand was sufficient to bias the criterion. These findings suggest that viewing touch influences tactile performance by altering tactile decision mechanisms rather than the tactile perceptual signal.
SponsorThis material is based upon works supported by the National Science Foundation under Grant 1632849.
CitationNair, A., Medina, J. Viewed touch influences tactile detection by altering decision criterion. Atten Percept Psychophys (2024). https://doi.org/10.3758/s13414-024-02959-7
ISSN1943-393X
URLhttps://udspace.udel.edu/handle/19716/35520
Languageen_US
PublisherAttention, Perception, & Psychophysics
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
Keywordsvicarious tactile activation
Keywordssignal detection theory
Keywordstactile perception
Keywordstactile sensitivity
Keywordsdecision criterion
TitleViewed touch influences tactile detection by altering decision criterion
TypeArticle
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