Eyes always attract attention but gaze orienting is task-dependent: evidence from eye movement monitoring.
Eyes and gaze are central to social cognition but whether they attract attention differently depending on the task is unknown. Here, the shift in attention towards the eye region and gaze direction of a perceived face was studied in two tasks by monitoring eye movements. The same face stimuli in front- or 3/4-view, with direct or averted gaze, were used in both tasks. In the Gaze task, subjects performed an explicit gaze direction judgment (gaze straight or averted) while in the Head task they performed a head orientation judgment (front- or 3/4-view). Gaze processing was evident in both tasks as shown by longer RTs and lower accuracy when head and gaze directions did not match. In both tasks the eye region was the most attended area but the amount of viewing was task-dependent. Most importantly, approximately 90% of the initial saccades landed in the eye region in the Gaze task but only approximately 50% of them did so in the Head task. These saccades were made in the direction signaled by gaze in the Gaze task but in the direction signaled by head orientation in the Head task. Altogether, these task-modulated behaviors argue against a purely exogenous and automatic orienting-to-gaze mechanism. Based on patient work and neuroimaging studies of gaze processing, we suggest that this task-dependent orienting behavior is rather endogenous and subtended by cortical areas amongst which frontal regions play a central role. We discuss the implications of this finding for clinical populations.
Itier
Roxane J
RJ
The Rotman Research Institute, Baycrest, Toronto, Canada. ritier@rotman-baycrest.on.ca
Villate
Christina
C
Ryan
Jennifer D
JD
D000328:Adult; D001288:Attention / Q000502:physiology*; D005123:Eye; D005133:Eye Movements / Q000502:physiology*; D005145:Face; D005260:Female; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D007100:Imitative Behavior / Q000502:physiology*; D008297:Male; D009949:Orientation / Q000502:physiology; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology