Multifractality in postural sway supports quiet eye training in aiming tasks: A study of golf putting
| Autor: | Damian G. Kelty-Stephen, Christopher A. Ralston, Madhur Mangalam, Quinn Berleman-Paul, Noah Jacobson |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty media_common.quotation_subject Posture Biophysics Experimental and Cognitive Psychology Optic Flow Eye 03 medical and health sciences Young Adult 0302 clinical medicine Physical medicine and rehabilitation Radial error Psychology Sports Perception medicine Humans Orthopedics and Sports Medicine Poisson Distribution Postural Balance media_common Haptic technology Foot Eye height Training (meteorology) 030229 sport sciences General Medicine Saccadic masking Fractals QUIET Golf Regression Analysis Female Quiet eye Psychology Perceptual information 030217 neurology & neurosurgery Psychomotor Performance |
| Zdroj: | Human movement science. 76 |
| ISSN: | 1872-7646 |
| Popis: | The ‘quiet eye’ (QE) approach to visually-guided aiming behavior invests fully in perceptual information’s potential to organize coordinated action. Sports psychologists refer to QE as the stillness of the eyes during aiming tasks and increasingly into self- and externally-paced tasks. Amidst the ‘noisy’ fluctuations of the athlete’s body, quiet eyes might leave fewer saccadic interruptions to the coupling between postural sway and optic flow. Postural sway exhibits fluctuations whose multifractal structure serves as a robust predictor of visual and haptic perceptual responses. Postural sway generates optic flow centered on an individual’s eye height. We predicted that perturbing the eye height by attaching wooden blocks below the feet would perturb the putting more so in QE-trained participants than participants trained technically. We also predicted that QE’s efficacy and responses to perturbation would depend on multifractality in postural sway. Specifically, we predicted that less multifractality would predict more adaptive responses to the perturbation and higher putting accuracy. Results showed that lower multifractality led to more accurate putts, and the perturbation of eye height led to less accurate putts, particularly for QE-trained participants. Models of radial error (i.e., the distance between the ball’s final position and the hole) indicated that lower estimates of multifractality due to nonlinearity coincided with a more adaptive response to the perturbation. These results suggest that reduced multifractality may act in a context-sensitive manner to restrain motoric degrees of freedom to achieve the task goal. |
| Databáze: | OpenAIRE |
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