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Article Dans Une Revue Human movement science Année : 2019

Interaction between eye and body movements to perform visual tasks in upright stance.

Résumé

Synergistic interactions between visual and postural behaviors were observed in a previous study during a precise visual task (search for a specific target in a picture) performed upright as steady as possible. The goal of the present study was to confirm and extend these novel findings in a more ecological condition with no steadiness requirement. Twelve healthy young adults performed two visual tasks, i.e. a precise task and a control task (free-viewing). Center of pressure, lower back, neck, head and eye movements were recorded during each task. The subjective cognitive workload was assessed after each task (NASA-TLX questionnaire). Pearson correlations and cross-correlations between eyes (time-series, characteristics of fixation) and center of pressure/body movements were used to test the synergistic model. As expected, significant negative Pearson correlations between eye and head-neck movement variables were only observed in searching. They indicated that larger precise gaze shifts were correlated with lower head and neck movements. One cross-correlation coefficient (between COP on the AP axis and eyes in the up/down direction) was also significantly higher, i.e. stronger, in searching than in free-viewing. These synergistic interactions likely required greater cognitive demand as indicated by the greater NASA-TLX score in searching. Moreover, the previous Pearson correlations were no longer significant after controlling for the NASA-TLX global score (thanks to partial correlations). This study provides new evidence of the existence of a synergistic process between visual and postural behaviors during visual search tasks.

Dates et versions

hal-02525724 , version 1 (24-09-2021)

Identifiants

Citer

Cédrick T. Bonnet, Tanguy Davin, Stéphane Baudry. Interaction between eye and body movements to perform visual tasks in upright stance.. Human movement science, 2019, Human movement science, 68, pp.102541. ⟨10.1016/j.humov.2019.102541⟩. ⟨hal-02525724⟩
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