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Systematic removal of visual feedback

Journal of Human Movement Studies 10(3): 165-174
Systematic removal of visual feedback
The effects of the systematic removal of visual feedback while performing a time-constrained single-aiming movement were examined. Subjects (n = 6) using a joystick maneuvered a cursor, displayed on an osciloscope screen, from a starting box to a target positioned at 4 amplitudes in a movement time of 400 .+-. 40 ms. Each subject participated in 7 blanking conditions during which the time of the initial visible segment was manipulated. Analysis of variance revealed a significant main effect on the 2 factors manipulated: movement amplitude and blanking or the amount of initial visual feedback available. Trend analysis indicated a significant linear amplitude component which supports previous findings of a positive relationship between amplitude and visual feedback. Post hoc analysis investigating the percentage of blanking effect suggested that visual information provided in the first 180 ms of a 400 ms movement is not used.

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Accession: 006574149

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