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| Research article summary (published 29 Jun 2002): |
Partial advance information, number of alternatives, and motor processes: an electromyographic study.
Full Abstract
We present evidence that advance information reducing the number of stimulus-response alternatives in a choice reaction time (RT) task can shorten the very latest motoric stages of RT. Effects of such advance information on late stages of RT have been demonstrated recently by Osman, Moore, and Ulrich (Acta Psychol. 90 (1995) 111), Leuthold, Sommer, and Ulrich (J. Exp. Psychol:
Gen. 125 (1996) 307), Müller-Gethmann, Rinkenauer, Stahl, and Ulrich (Psychophysiology 37 (2000) 507). These studies found that advance information shortens the portion of the RT interval following onset of a movement-related brain potential (lateralized readiness potential). Osman et al. and Müller-Gethmann et al. also examined the portion of the RT interval following the start of electromyographic (EMG) activity and found no effect of advance information. Based on Osman et al.'s null result, Leuthold et al. speculated that advance information may shorten only the RT stages preceding EMG activity. This conclusion, however, is questionable because of limitations in the EMG measures employed by both Osman et al. and Müller-Gethmann et al. We have reanalyzed the results of a previously reported experiment (Acta Psychol. 101 (1999) 243) to show that advance information can in fact affect the rate of recruitment of motor units in the prime mover of the responding limb.
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Author information
Author/s: Possamaď, Camille-Aimé (CA); Burle, Borís (B); Osma, Allen (A); Hasbroucq, Thierry (T);
Affiliation: Laboratoire d' Analyse de la Performance Motrice Humaine, Maison des Sciences de l'Homme et de la Société, Université de Poitiers, France. Camille-Aime.Possamai(-atsign-)mshs.univ-poitiers.fr
Grants: NS37528 (Agency:United States NINDS)
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.
Journal: Acta psychologica (Acta Psychol (Amst)), published in Netherlands. (Language: eng)
Reference: 2002-Jul; vol 111 (issue 1) : pp 125-39
Dates: Created 2002/07/09; Completed 2002/10/10; Revised 2007/11/14;
PMID: 12102117, 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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