Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

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

Abstract : 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.
Type de document :
Article dans une revue
Liste complète des métadonnées

Littérature citée [33 références]  Voir  Masquer  Télécharger
Contributeur : Lilloa Université de Lille <>
Soumis le : mercredi 1 avril 2020 - 15:13:21
Dernière modification le : jeudi 24 juin 2021 - 11:20:31




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⟩



Consultations de la notice