ERIC Number: EJ777462
Record Type: Journal
Publication Date: 2007-Oct
Reference Count: 0
Target Selection during Bimanual Reaching to Direct Cues Is Unaffected by the Perceptual Similarity of the Targets
Albert, Neil B.; Weigelt, Matthias; Hazeltine, Eliot; Ivry, Richard B.
Journal of Experimental Psychology: Human Perception and Performance, v33 n5 p1107-1116 Oct 2007
Investigations of bimanual movements have shed considerable insight on the constraints underlying our ability to perform coordinated actions. One prominent limitation is evident when people are required to produce reaching movements in which the two trajectories are of different amplitudes and/or directions. This effect, however, is only obtained when the movements are cued symbolically (e.g., letters indicate target locations); these planning costs are absent when the target locations are directly cued (J. Diedrichsen, E. Hazeltine, S. Kennerley, & R. B. Ivry, 2001). The present experiments test whether the absence of planning costs under the latter condition is due to the perceptual similarity of the direct cues. The results demonstrate that measures of response planning and execution do not depend on the perceptual similarity of the direct cues. Limitations in our ability to perform distinct actions with the two hands appear to reflect interactions related to response selection involving the translation of symbolic cues into their associated movements rather than arise from interactions associated with perception, motor programming, and motor execution.
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Publication Type: Journal Articles; Reports - Evaluative
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