Influence of eye dominance on oculomotor and attentional selection
Résumé
The dominant eye is the one used to perform a monocular task. There is an advantage of the hemifield controlateral to the dominant eye for both motor (higher saccade accuracy) and perceptual (faster detection) performance. The current study examines the influence of eye dominance in a dual-task paradigm. It involves a saccade and a discrimination task to one of the six locations possible, enabling the dissociation between saccade target and discrimination target. Four groups of participants are tested, according to their eye dominance and eye dominance strength. We investigate whether the higher saccade accuracy in the hemifield controlateral to the dominant eye is due to enhancement of the target location or to inhibition of the distractor locations. Preliminary results on discrimination performance suggest that eye dominance is associated to attentional asymmetries between visual hemifields.
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