Cargando…
Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP?
Unlike perceptual size judgments, actions—but not delayed actions—performed under full vision are relatively unaffected by the Müller-Lyer illusion. Controversy remains as to the source of these effects. We aimed to illuminate the problem by exploiting the possibility that vision for action and perc...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
SAGE Publications
2011
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393715/ http://dx.doi.org/10.1068/ic214 |
_version_ | 1783229610347986944 |
---|---|
author | De Wit, Matthieu Van Der Kamp, John Masters, Rich |
author_facet | De Wit, Matthieu Van Der Kamp, John Masters, Rich |
author_sort | De Wit, Matthieu |
collection | PubMed |
description | Unlike perceptual size judgments, actions—but not delayed actions—performed under full vision are relatively unaffected by the Müller-Lyer illusion. Controversy remains as to the source of these effects. We aimed to illuminate the problem by exploiting the possibility that vision for action and perception may have distinct thresholds. In Experiment 1 participants performed delayed pointing movements towards briefly presented (12 ms–masked) M-L targets of different sizes. While participants were unable to perceptually discriminate between targets, their movements were nevertheless a function of target size, but not of the illusion (de Wit, van der Kamp, & Masters, in press). This implies 1) that vision for action is functional even after a delay and/or 2) that distinct thresholds exists for egocentric and allocentric information pick up, possibly irrespective of whether a task is perceptual or motoric in nature. Experiment 2, in which participants manually matched the size of perceptually indiscriminable M-L targets, supports the latter option. These findings are reviewed in relation to recent discussions of the two-visual-systems model. de Wit, M.M., van der Kamp, J., & Masters, R.S.W. (in press). Delayed pointing movements to masked Müller-Lyer figures are affected by target size but not the illusion. Neuropsychologia. |
format | Online Article Text |
id | pubmed-5393715 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | SAGE Publications |
record_format | MEDLINE/PubMed |
spelling | pubmed-53937152017-04-24 Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? De Wit, Matthieu Van Der Kamp, John Masters, Rich Iperception Article Unlike perceptual size judgments, actions—but not delayed actions—performed under full vision are relatively unaffected by the Müller-Lyer illusion. Controversy remains as to the source of these effects. We aimed to illuminate the problem by exploiting the possibility that vision for action and perception may have distinct thresholds. In Experiment 1 participants performed delayed pointing movements towards briefly presented (12 ms–masked) M-L targets of different sizes. While participants were unable to perceptually discriminate between targets, their movements were nevertheless a function of target size, but not of the illusion (de Wit, van der Kamp, & Masters, in press). This implies 1) that vision for action is functional even after a delay and/or 2) that distinct thresholds exists for egocentric and allocentric information pick up, possibly irrespective of whether a task is perceptual or motoric in nature. Experiment 2, in which participants manually matched the size of perceptually indiscriminable M-L targets, supports the latter option. These findings are reviewed in relation to recent discussions of the two-visual-systems model. de Wit, M.M., van der Kamp, J., & Masters, R.S.W. (in press). Delayed pointing movements to masked Müller-Lyer figures are affected by target size but not the illusion. Neuropsychologia. SAGE Publications 2011-05-01 2011-05 /pmc/articles/PMC5393715/ http://dx.doi.org/10.1068/ic214 Text en © 2011 SAGE Publications Ltd. Manuscript content on this site is licensed under Creative Commons Licenses http://creativecommons.org/licenses/by-nc-nd/3.0/ This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm). |
spellingShingle | Article De Wit, Matthieu Van Der Kamp, John Masters, Rich Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title | Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title_full | Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title_fullStr | Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title_full_unstemmed | Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title_short | Distinct Visual Thresholds for Egocentric and Allocentric Information Pick UP? |
title_sort | distinct visual thresholds for egocentric and allocentric information pick up? |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5393715/ http://dx.doi.org/10.1068/ic214 |
work_keys_str_mv | AT dewitmatthieu distinctvisualthresholdsforegocentricandallocentricinformationpickup AT vanderkampjohn distinctvisualthresholdsforegocentricandallocentricinformationpickup AT mastersrich distinctvisualthresholdsforegocentricandallocentricinformationpickup |