Abstract
A trial-by-trial analysis was used to systematically examine the influence of switching visual conditions on visual feedback utilization for a manual aiming movement. In experiment one, vision was randomly manipulated from trial to trial with no more than four consecutive trials in the same visual condition. In experiment two, participants were provided with certainty of visual feedback availability prior to every trial. Results of both studies revealed that movement endpoint variability was most associated with visual feedback availability on the previous trial. Furthermore, correlation analyses comparing movement trajectory at 25, 50 and 75% with movement end (i.e. 100%) revealed that the efficiency of online corrections also depends on the availability of visual feedback on the previous trial. These results suggest that the accuracy of an aiming movement is highly dependent on processing of offline visual information from the preceding trial.
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Notes
It must be acknowledged that one limitation to our study is the fact that only one (1) target was used throughout the experiment. As such, the control strategies for planning and online control may be different when multiple targets are presented. We thank an anonymous reviewer for pointing out this limitation.
We thank an anonymous reviewer for directing us towards these corroborating studies.
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This study was supported by a grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) awarded to Luc Tremblay.
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Cheng, D.T., Luis, M. & Tremblay, L. Randomizing visual feedback in manual aiming: reminiscence of the previous trial condition and prior knowledge of feedback availability. Exp Brain Res 189, 403–410 (2008). https://doi.org/10.1007/s00221-008-1436-3
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DOI: https://doi.org/10.1007/s00221-008-1436-3