Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity

Abstract The ability to distinguish self-generated stimuli from those caused by external sources is critical for all behaving organisms. Although many studies point to a sensory attenuation of self-generated stimuli, recent evidence suggests that motor actions can result in either attenuated or enha...

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Autores principales:	Nadia Paraskevoudi, Iria SanMiguel
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/489f2f2371034ad587dd10b77f28a0ec
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spelling	oai:doaj.org-article:489f2f2371034ad587dd10b77f28a0ec2021-12-02T16:34:58ZSelf-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity10.1038/s41598-021-96346-z2045-2322https://doaj.org/article/489f2f2371034ad587dd10b77f28a0ec2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96346-zhttps://doaj.org/toc/2045-2322Abstract The ability to distinguish self-generated stimuli from those caused by external sources is critical for all behaving organisms. Although many studies point to a sensory attenuation of self-generated stimuli, recent evidence suggests that motor actions can result in either attenuated or enhanced perceptual processing depending on the environmental context (i.e., stimulus intensity). The present study employed 2-AFC sound detection and loudness discrimination tasks to test whether sound source (self- or externally-generated) and stimulus intensity (supra- or near-threshold) interactively modulate detection ability and loudness perception. Self-generation did not affect detection and discrimination sensitivity (i.e., detection thresholds and Just Noticeable Difference, respectively). However, in the discrimination task, we observed a significant interaction between self-generation and intensity on perceptual bias (i.e. Point of Subjective Equality). Supra-threshold self-generated sounds were perceived softer than externally-generated ones, while at near-threshold intensities self-generated sounds were perceived louder than externally-generated ones. Our findings provide empirical support to recent theories on how predictions and signal intensity modulate perceptual processing, pointing to interactive effects of intensity and self-generation that seem to be driven by a biased estimate of perceived loudness, rather by changes in detection and discrimination sensitivity.Nadia ParaskevoudiIria SanMiguelNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nadia Paraskevoudi Iria SanMiguel Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
description	Abstract The ability to distinguish self-generated stimuli from those caused by external sources is critical for all behaving organisms. Although many studies point to a sensory attenuation of self-generated stimuli, recent evidence suggests that motor actions can result in either attenuated or enhanced perceptual processing depending on the environmental context (i.e., stimulus intensity). The present study employed 2-AFC sound detection and loudness discrimination tasks to test whether sound source (self- or externally-generated) and stimulus intensity (supra- or near-threshold) interactively modulate detection ability and loudness perception. Self-generation did not affect detection and discrimination sensitivity (i.e., detection thresholds and Just Noticeable Difference, respectively). However, in the discrimination task, we observed a significant interaction between self-generation and intensity on perceptual bias (i.e. Point of Subjective Equality). Supra-threshold self-generated sounds were perceived softer than externally-generated ones, while at near-threshold intensities self-generated sounds were perceived louder than externally-generated ones. Our findings provide empirical support to recent theories on how predictions and signal intensity modulate perceptual processing, pointing to interactive effects of intensity and self-generation that seem to be driven by a biased estimate of perceived loudness, rather by changes in detection and discrimination sensitivity.
format	article
author	Nadia Paraskevoudi Iria SanMiguel
author_facet	Nadia Paraskevoudi Iria SanMiguel
author_sort	Nadia Paraskevoudi
title	Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
title_short	Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
title_full	Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
title_fullStr	Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
title_full_unstemmed	Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
title_sort	self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/489f2f2371034ad587dd10b77f28a0ec
work_keys_str_mv	AT nadiaparaskevoudi selfgenerationandsoundintensityinteractivelymodulateperceptualbiasbutnotperceptualsensitivity AT iriasanmiguel selfgenerationandsoundintensityinteractivelymodulateperceptualbiasbutnotperceptualsensitivity
_version_	1718383749157093376

Self-generation and sound intensity interactively modulate perceptual bias, but not perceptual sensitivity

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