title: Location but not amount of stimulus occlusion influences  the stability of visuomotor coordination.
abstract: The current study examined whether the amount and location of available movement information influenced the stability of visuomotor coordination. Participants coordinated a handheld pendulum with an oscillating visual stimulus in an inphase and antiphase manner. The effects of occluding different amounts of phase at different phase locations were examined. Occluding the 0°/180° phase locations (end-points) significantly increased the variability of the visuomotor coordination. The amount of occlusion had little or no affect on the stability of the coordination. We concluded that the end-points of a visual rhythm are privileged and provide access to movement information that ensures stable coordination. The results are discussed with respect to the proposal of Bingham (Ecol Psychol 16:45–43, 2004) and Wilson et al. (Exp Brain Res 165:351–361, 2005) that the relevant information for rhythmic visual coordination is relative direction information.
authors.affiliation: Department of Psychology, University of Southern Mississippi, 118 College Dr. #5025, Hattiesburg, MS 39406, USA. alen.hajnal@usm.edu
authors.forename: Alen
authors.initials: A
authors.lastname: Hajnal
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Richardson
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Harrison
authors.forename: R C
authors.initials: RC
authors.lastname: Schmidt