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| Research article summary (published 29 Apr 2003): |
On the role of peripheral visual afferent information for the control of rapid video-aiming movements.
Full Abstract
It has been shown that, even for very fast and short duration movements, seeing one's hand in peripheral vision, or a cursor representing it on a video screen, resulted in a better direction accuracy of a manual aiming movement than when the task was performed while only the target was visible. However, it is still unclear whether this was caused by on-line or off-line processes. Through a novel series of analyses, the goal of the present study was to shed some light on this issue. We replicated previous results showing that the visual information concerning one's movement, which is available between 40 degrees and 25 degrees of visual angle, is not useful to ensure direction accuracy of video-aiming movements, whereas visual afferent information available between 40 degrees and 15 degrees of visual angle improved direction accuracy over a target-only condition. In addition, endpoint variability on the direction component of the task was scaled to direction variability observed at peak movement velocity. Similar observations were made in a second experiment when the position of the cursor was translated to the left or to the right as soon as it left the starting base. Further, the data showed no evidence of on-line correction to the direction dimension of the task for the translated trials. Taken together, the results of the two experiments strongly suggest that, for fast video-aiming movements, the information concerning one's movement that is available in peripheral vision is used off-line.Copyright 2003 Elsevier Science B.V.
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Author information
Author/s: Bédard, Patrick (P); Proteau, Luc (L);
Affiliation: Département de kinésiologie, Université de Montréal, Casier postal 6128, Succursale Centre-ville, Montréal, Canada H3C 3J7.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Acta psychologica (Acta Psychol (Amst)), published in Netherlands. (Language: eng)
Reference: 2003-May; vol 113 (issue 1) : pp 99-117
Dates: Created 2003/04/07; Completed 2003/05/23; Revised 2006/11/15;
PMID: 12679046, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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