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- Title
Illusion effects on grasping are temporally constant not dynamic.
- Authors
Franz, V H; Scharnowski, F; Gegenfurtner, K R
- Abstract
The authors tested whether the effects of the Ebbinghaus illusion on grasping are corrected during late phases of the movement. Surprisingly, the grasp aperture was corrected neither under no-vision (N = 52) nor under full-vision (N = 48) conditions. The authors show that previous reports of a correction (e.g., S. Glover & P. Dixon, 2002a) are due to 2 artifacts: (a) inclusion of time points at which the target object was already touched and (b) erroneous statistics. This removes the central evidence on which S. Glover and P. Dixon's (2001a) planning-control model of action is based. In addition, the authors' results can help to refine more classic notions of motor control (e.g., R. Woodworth, 1899). In consequence, the authors reject S. Glover and P. Dixon's (2001a) planning-control model but not classic online-control theories.
- Publication
Journal of experimental psychology. Human perception and performance, 2005, Vol 31, Issue 6, p1359
- ISSN
0096-1523
- Publication type
Journal Article
- DOI
10.1037/0096-1523.31.6.1359