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Configurational asymmetry in vernier offset detection

Two psychophysical experiments were conducted at the horizontal and vertical orientations respectively, demonstrating substantial main effect of configuration, but no effect of offset direction on vernier acuity. In Experiment 1, a pair of horizontal bars were arranged side by side with a large gap...

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Autores principales: Karim, A. K. M. Rezaul, Kojima, Haruyuki
Formato: Texto
Lenguaje:English
Publicado: University of Finance and Management in Warsaw 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2950944/
https://www.ncbi.nlm.nih.gov/pubmed/20930953
http://dx.doi.org/10.2478/v10053-008-0077-1
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author Karim, A. K. M. Rezaul
Kojima, Haruyuki
author_facet Karim, A. K. M. Rezaul
Kojima, Haruyuki
author_sort Karim, A. K. M. Rezaul
collection PubMed
description Two psychophysical experiments were conducted at the horizontal and vertical orientations respectively, demonstrating substantial main effect of configuration, but no effect of offset direction on vernier acuity. In Experiment 1, a pair of horizontal bars were arranged side by side with a large gap between them. The observers were, on average, significantly better at discriminating a vertical offset if the right-hand bar was below the left-hand bar than vice versa, regardless of which bar they experienced as displaced and which as constant. A similar asymmetry was evident in Experiment 2 where observers judged horizontal offset for a pair of vertically oriented bars, where one was placed above the other. In this case average performance was better if the upper bar was on the right of the lower bar rather than on its left. There were large individual variations in the asymmetrical trend, but the effect could not be explained by subjective response bias. Furthermore, vernier acuity improved significantly and the asymmetry decreased more or less as a function of training. The average asymmetrical trend was consistent across training days and across two orientations, which indicates that the processing of line vernier stimuli is possibly configuration-specific in the cardinal orientation.
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spelling pubmed-29509442010-10-07 Configurational asymmetry in vernier offset detection Karim, A. K. M. Rezaul Kojima, Haruyuki Adv Cogn Psychol Research Article Two psychophysical experiments were conducted at the horizontal and vertical orientations respectively, demonstrating substantial main effect of configuration, but no effect of offset direction on vernier acuity. In Experiment 1, a pair of horizontal bars were arranged side by side with a large gap between them. The observers were, on average, significantly better at discriminating a vertical offset if the right-hand bar was below the left-hand bar than vice versa, regardless of which bar they experienced as displaced and which as constant. A similar asymmetry was evident in Experiment 2 where observers judged horizontal offset for a pair of vertically oriented bars, where one was placed above the other. In this case average performance was better if the upper bar was on the right of the lower bar rather than on its left. There were large individual variations in the asymmetrical trend, but the effect could not be explained by subjective response bias. Furthermore, vernier acuity improved significantly and the asymmetry decreased more or less as a function of training. The average asymmetrical trend was consistent across training days and across two orientations, which indicates that the processing of line vernier stimuli is possibly configuration-specific in the cardinal orientation. University of Finance and Management in Warsaw 2010-10-06 /pmc/articles/PMC2950944/ /pubmed/20930953 http://dx.doi.org/10.2478/v10053-008-0077-1 Text en Copyright: © 2009 University of Finance and Management in Warsaw http://creativecommons.org/licenses/by/2.5/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Karim, A. K. M. Rezaul
Kojima, Haruyuki
Configurational asymmetry in vernier offset detection
title Configurational asymmetry in vernier offset detection
title_full Configurational asymmetry in vernier offset detection
title_fullStr Configurational asymmetry in vernier offset detection
title_full_unstemmed Configurational asymmetry in vernier offset detection
title_short Configurational asymmetry in vernier offset detection
title_sort configurational asymmetry in vernier offset detection
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2950944/
https://www.ncbi.nlm.nih.gov/pubmed/20930953
http://dx.doi.org/10.2478/v10053-008-0077-1
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