title: Amplitude differences, spatial assimilation, and integrated feedback in bimanual coordination.
abstract: The purpose of the experiment was to determine the influence of Lissajous feedback on 1:1 bimanual coordination patterns (0 degrees , 90 degrees , and 180 degrees phase lags) when the movement amplitudes of the two limbs were different (30 degrees , 60 degrees ). The present data supports the notion that the lead-lag relationship as well as amplitude assimilation observed in the literature can be partially attributed to the visual-perceptual factors present in the testing environment. When participants are provided integrated feedback in the form of Lissajous plots much of the lead-lag and amplitude assimilation effects were eliminated, and relative phase error and variability were also greatly reduced after only 3 min of practice under each condition.
authors.affiliation: Department of Health and Kinesiology, Texas A&M University, College Station, TX 77843-4243, USA.
authors.forename: Attila J
authors.initials: AJ
authors.lastname: Kovacs
authors.forename: Charles H
authors.initials: CH
authors.lastname: Shea
mesh_terms: D030141:Feedback, Psychological; D006225:Hand; D006801:Humans; D009048:Motor Skills; D011214:Practice, Psychological; D011597:Psychomotor Performance; D013647:Task Performance and Analysis; D013997:Time Factors; D014796:Visual Perception