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The Müller-Lyer illusion affects the planning and control of manual aiming movements.
Exp Brain Res. 2004 Mar; 155(1):37-47.EB

Abstract

Participants made perceptual judgments about the length of, and manual aiming movements to the opposite end of, formerly visible Müller-Lyer stimuli. The Müller-Lyer illusion affected both perceptual judgments and aiming amplitude. Manipulations of stimulus duration (10 ms or 3000 ms) and memory delay length (10 ms or 3000 ms) had no impact on the illusory effect. Aiming movements executed with vision of the hand were less affected by the illusion than movements executed without vision of the hand. The effect of the illusion on aiming amplitude remained the same between peak velocity and the end of the movement even though participants were engaged in on-line control between peak deceleration and the end of the movement. This latter finding was counter to the predictions of a hypothesis (Glover 2002) stating that illusions should only affect the early (planning) stages of movement and not the late (control) stages of movement. We conclude that a single visual representation is used for perception, motor planning, and motor control.

Authors+Show Affiliations

Department of Psychology, University of Guelph, N1G 2W1, Guelph, Ontario, Canada. dmeegan@uoguelph.caNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15064883

Citation

Meegan, Daniel V., et al. "The Müller-Lyer Illusion Affects the Planning and Control of Manual Aiming Movements." Experimental Brain Research, vol. 155, no. 1, 2004, pp. 37-47.
Meegan DV, Glazebrook CM, Dhillon VP, et al. The Müller-Lyer illusion affects the planning and control of manual aiming movements. Exp Brain Res. 2004;155(1):37-47.
Meegan, D. V., Glazebrook, C. M., Dhillon, V. P., Tremblay, L., Welsh, T. N., & Elliott, D. (2004). The Müller-Lyer illusion affects the planning and control of manual aiming movements. Experimental Brain Research, 155(1), 37-47.
Meegan DV, et al. The Müller-Lyer Illusion Affects the Planning and Control of Manual Aiming Movements. Exp Brain Res. 2004;155(1):37-47. PubMed PMID: 15064883.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Müller-Lyer illusion affects the planning and control of manual aiming movements. AU - Meegan,Daniel V, AU - Glazebrook,Cheryl M, AU - Dhillon,Victoria P, AU - Tremblay,Luc, AU - Welsh,Timothy N, AU - Elliott,Digby, Y1 - 2003/11/15/ PY - 2002/10/12/received PY - 2003/08/27/accepted PY - 2004/4/6/pubmed PY - 2004/5/12/medline PY - 2004/4/6/entrez SP - 37 EP - 47 JF - Experimental brain research JO - Exp Brain Res VL - 155 IS - 1 N2 - Participants made perceptual judgments about the length of, and manual aiming movements to the opposite end of, formerly visible Müller-Lyer stimuli. The Müller-Lyer illusion affected both perceptual judgments and aiming amplitude. Manipulations of stimulus duration (10 ms or 3000 ms) and memory delay length (10 ms or 3000 ms) had no impact on the illusory effect. Aiming movements executed with vision of the hand were less affected by the illusion than movements executed without vision of the hand. The effect of the illusion on aiming amplitude remained the same between peak velocity and the end of the movement even though participants were engaged in on-line control between peak deceleration and the end of the movement. This latter finding was counter to the predictions of a hypothesis (Glover 2002) stating that illusions should only affect the early (planning) stages of movement and not the late (control) stages of movement. We conclude that a single visual representation is used for perception, motor planning, and motor control. SN - 0014-4819 UR - https://www.unboundmedicine.com/medline/citation/15064883/The_Müller_Lyer_illusion_affects_the_planning_and_control_of_manual_aiming_movements_ L2 - https://dx.doi.org/10.1007/s00221-003-1702-3 DB - PRIME DP - Unbound Medicine ER -