EFFECT OF CONCURRENT FEEDBACK AND POSTURAL TASK DIFFICULTY ON POSTURAL CONTROL

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2022-9

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TAŞCI, SEDA

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Studies investigating the effect of concurrent feedback reported inconsistent results, especially on motor tasks with different difficulties. There is also lack of studies examining the effects of concurrent feedback on postural tasks with different difficulties. To fill this gap, this study investigated the effect of concurrent visual feedback (CVF) and postural task difficulty (PTD) on postural control in acquisition and retention phases. Participants were 40 university students who were randomly allocated to experimental and control groups based on time of arrival and gender. Participants performed six postural tasks with varying difficulties in one day. Each task was repeated three times for 60 seconds. Instantaneous center of pressure (CoP) location was provided to the experimental group as the source of CVF in acquisition phase, but it was withdrawn in retention phase (24 hours in between). Participants in control group performed same tasks without any feedback in both phases. The assessment parameters were velocity (AP-ML-RD), variability (AP-ML-RD), range (AP- ML-RD), ellipse area, and regularity (i.e., approximate entropy) of CoP trajectory. Acquisition phase results showed that feedback had a significant effect on variability in the AP and RD directions, ellipse area, and entropy parameters. Retention phase results showed that CVF did not affected any assessed parameters. PTD has been found to be effective for both acquisition and retention phases. This study indicated that CVF improved variability, ellipse area, and entropy parameters. CVF might increase adaptation to specific contexts and augment sensory integration by preventing cognitive overload and affect postural sway parameters positively. However, limited number of trials and sessions with CVF might be reason for the lack of retention effect.

Subject Keywords

Postural Control, Postural Sway, Concurrent Feedback, Task Difficulty, Postural Task Difficulty

URI

https://hdl.handle.net/11511/98752

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Graduate School of Social Sciences, Thesis

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Citation Formats

S. TAŞCI, “EFFECT OF CONCURRENT FEEDBACK AND POSTURAL TASK DIFFICULTY ON POSTURAL CONTROL,” M.S. - Master of Science, Middle East Technical University, 2022.