Prospective and retrospective effects in a virtual pointing task.
Identifieur interne : 002529 ( Ncbi/Merge ); précédent : 002528; suivant : 002530Prospective and retrospective effects in a virtual pointing task.
Auteurs : Christoph Schütz [Allemagne] ; Thomas SchackSource :
- Acta psychologica [ 1873-6297 ] ; 2013.
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Abstract
Over two decades ago prospective and retrospective effects of posture selection in a sequential task were described for the first time. Since then, both effects have been reproduced in a number of reaching studies. We asked (1) whether retrospective effects would also be found in a sequential pointing task and (2) whether pro/retrospective effects of posture selection would transfer to the end-effector position in the absence of haptic feedback. To this end, we created a sequential, perceptual-motor task in a virtual environment. Participants had to point to a row of targets in the frontal plane in sequential order. In a control experiment, physical targets were placed at the same locations. Results showed that kinematic parameters were similar in the virtual and real environment. Retrospective effects of posture/position were found in neither environment, indicating that pointing movements require lower cognitive planning costs than reaching movements. Prospective effects of posture were found both in the virtual and real environment. Prospective effects of position, on the other hand, were present in the virtual but not in the real environment, indicating that the absence of haptic feedback may result in unconscious shifts of the end-effector position.
DOI: 10.1016/j.actpsy.2013.01.005
PubMed: 23419809
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Since then, both effects have been reproduced in a number of reaching studies. We asked (1) whether retrospective effects would also be found in a sequential pointing task and (2) whether pro/retrospective effects of posture selection would transfer to the end-effector position in the absence of haptic feedback. To this end, we created a sequential, perceptual-motor task in a virtual environment. Participants had to point to a row of targets in the frontal plane in sequential order. In a control experiment, physical targets were placed at the same locations. Results showed that kinematic parameters were similar in the virtual and real environment. Retrospective effects of posture/position were found in neither environment, indicating that pointing movements require lower cognitive planning costs than reaching movements. Prospective effects of posture were found both in the virtual and real environment. 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