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| Research article summary (published 20 Nov 2002): |
Informational constraints in human precision aiming.
Full Abstract
Twelve human subjects performed a reciprocal precision aiming task of varying difficulty (index of difficulty=4, 5, or 6) while vision of the ongoing movement was available either continuously or intermittently. In the intermittent conditions, vision of the moving end-effector was available at regular intervals (equal to 100%, 125%, or 150% of the movement durations measured under continuous visibility conditions) for varying amounts of time (75%, 50%, or 25% of the duration of the interval). Movement time (MT) increased with both increasing task difficulty and decreasing availability of visual information. Increases in MT were brought about by the same systematic changes in the kinematic characteristics of movement, whether task difficulty increased or availability of visual information decreased. At higher levels of task difficulty, subjects organized their movements so as to make visual information available at particular instances (at the start and at the end of the aiming movement).
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Author information
Author/s: Bootsma, Reinoud J (RJ); Boulard, Marion (M); Fernandez, Laure (L); Mottet, Denis (D);
Affiliation: UMR Movement and Perception, University of the Mediterranean and CNRS, 163 avenue de Luminy, CP 910, 13288 cedex 9, Marseille, France. bootsma(-atsign-)laps.univ-mrs.fr
Journal and publication information
Publication Type: Journal Article
Journal: Neuroscience letters (Neurosci Lett), published in Ireland. (Language: eng)
Reference: 2002-Nov; vol 333 (issue 2) : pp 141-5
Dates: Created 2002/11/06; Completed 2002/12/30; Revised 2004/11/17;
PMID: 12419500, 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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