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Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data

Brain activity related to time estimation processes in humans was analyzed using a perceptual phenomenon called auditory temporal assimilation. In a typical stimulus condition, two neighboring time intervals (T1 and T2 in this order) are perceived as equal even when the physical lengths of these tim...

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Autores principales: Mitsudo, Takako, Nakajima, Yoshitaka, Takeichi, Hiroshige, Tobimatsu, Shozo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4172001/
https://www.ncbi.nlm.nih.gov/pubmed/25295013
http://dx.doi.org/10.3389/fpsyg.2014.00937
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author Mitsudo, Takako
Nakajima, Yoshitaka
Takeichi, Hiroshige
Tobimatsu, Shozo
author_facet Mitsudo, Takako
Nakajima, Yoshitaka
Takeichi, Hiroshige
Tobimatsu, Shozo
author_sort Mitsudo, Takako
collection PubMed
description Brain activity related to time estimation processes in humans was analyzed using a perceptual phenomenon called auditory temporal assimilation. In a typical stimulus condition, two neighboring time intervals (T1 and T2 in this order) are perceived as equal even when the physical lengths of these time intervals are considerably different. Our previous event-related potential (ERP) study demonstrated that a slow negative component (SNCt) appears in the right-frontal brain area (around the F8 electrode) after T2, which is associated with judgment of the equality/inequality of T1 and T2. In the present study, we conducted two ERP experiments to further confirm the robustness of the SNCt. The stimulus patterns consisted of two neighboring time intervals marked by three successive tone bursts. Thirteen participants only listened to the patterns in the first session, and judged the equality/inequality of T1 and T2 in the next session. Behavioral data showed typical temporal assimilation. The ERP data revealed that three components (N1; contingent negative variation, CNV; and SNCt) emerged related to the temporal judgment. The N1 appeared in the central area, and its peak latencies corresponded to the physical timing of each marker onset. The CNV component appeared in the frontal area during T2 presentation, and its amplitude increased as a function of T1. The SNCt appeared in the right-frontal area after the presentation of T1 and T2, and its magnitude was larger for the temporal patterns causing perceptual inequality. The SNCt was also correlated with the perceptual equality/inequality of the same stimulus pattern, and continued up to about 400 ms after the end of T2. These results suggest that the SNCt can be a signature of equality/inequality judgment, which derives from the comparison of the two neighboring time intervals.
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spelling pubmed-41720012014-10-07 Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data Mitsudo, Takako Nakajima, Yoshitaka Takeichi, Hiroshige Tobimatsu, Shozo Front Psychol Psychology Brain activity related to time estimation processes in humans was analyzed using a perceptual phenomenon called auditory temporal assimilation. In a typical stimulus condition, two neighboring time intervals (T1 and T2 in this order) are perceived as equal even when the physical lengths of these time intervals are considerably different. Our previous event-related potential (ERP) study demonstrated that a slow negative component (SNCt) appears in the right-frontal brain area (around the F8 electrode) after T2, which is associated with judgment of the equality/inequality of T1 and T2. In the present study, we conducted two ERP experiments to further confirm the robustness of the SNCt. The stimulus patterns consisted of two neighboring time intervals marked by three successive tone bursts. Thirteen participants only listened to the patterns in the first session, and judged the equality/inequality of T1 and T2 in the next session. Behavioral data showed typical temporal assimilation. The ERP data revealed that three components (N1; contingent negative variation, CNV; and SNCt) emerged related to the temporal judgment. The N1 appeared in the central area, and its peak latencies corresponded to the physical timing of each marker onset. The CNV component appeared in the frontal area during T2 presentation, and its amplitude increased as a function of T1. The SNCt appeared in the right-frontal area after the presentation of T1 and T2, and its magnitude was larger for the temporal patterns causing perceptual inequality. The SNCt was also correlated with the perceptual equality/inequality of the same stimulus pattern, and continued up to about 400 ms after the end of T2. These results suggest that the SNCt can be a signature of equality/inequality judgment, which derives from the comparison of the two neighboring time intervals. Frontiers Media S.A. 2014-09-23 /pmc/articles/PMC4172001/ /pubmed/25295013 http://dx.doi.org/10.3389/fpsyg.2014.00937 Text en Copyright © 2014 Mitsudo, Nakajima, Takeichi and Tobimatsu. 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
Mitsudo, Takako
Nakajima, Yoshitaka
Takeichi, Hiroshige
Tobimatsu, Shozo
Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title_full Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title_fullStr Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title_full_unstemmed Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title_short Perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
title_sort perceptual inequality between two neighboring time intervals defined by sound markers: correspondence between neurophysiological and psychological data
topic Psychology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4172001/
https://www.ncbi.nlm.nih.gov/pubmed/25295013
http://dx.doi.org/10.3389/fpsyg.2014.00937
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