Visualizations of Visuomotor Strategies for Grasping a Spinning Target
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Date
2017
Authors
Leferink, Charlotte
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Abstract
Planning a grasp towards a rapidly rotating target necessitates that visuomotor strategies adapt to both the speed of the target’s rotation and to the new grasp sites that come into play throughout the reach. In this study, participants were instructed to grasp a virtual rectangular target that was spinning in either direction at one of four speeds about a fixed point. Eye and hand movements were recorded throughout. Characterizations of visuomotor strategies were depicted through probabilistic maps of eye fixations across spatial and temporal dimensions. Sequences of fixations showed that variation across viewing strategies increased with the speed of the target. Eye movement patterns also indicated that a greater challenged was posed by the counterclockwise direction than at the clockwise direction. One subgroup of participants showed more aptitude for the task. These findings suggest that perceived ability influences fixation strategies during grasping tasks.
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Keywords
Eye-fixations, Fixation sequences, Grasping, Moving target