Microsaccades as an overt measure of covert attention shifts
نویسندگان
چکیده
منابع مشابه
Microsaccades as an overt measure of covert attention shifts
Microsaccades, or tiny eye movements that take place during periods of fixation, have long been thought to be random artifacts of the oculomotor system. Here we demonstrate a possible link between microsaccades and covert attention shifts. We designed two psychophysical tasks involving spatial cues that had identical sensory stimuli but differing patterns of attentional benefits and costs. We f...
متن کاملSpontaneous microsaccades reflect shifts in covert attention.
Microsaccade rate during fixation is modulated by the presentation of a visual stimulus. When the stimulus is an endogenous attention cue, the ensuing microsaccades tend to be directed toward the cue. This finding has been taken as evidence that microsaccades index the locus of spatial attention. But the vast majority of microsaccades that subjects make are not triggered by visual stimuli. Unde...
متن کاملMicrosaccades Are an Index of Covert Attention
Horowitz, Fine, Fencsik, Yurgenson, and Wolfe (2007, this issue) investigated the relation between microsaccade congruency (MC, the congruency between the direction of the microsaccade and the location of the target) and reaction time (RT) in a spatial cuing paradigm and concluded that ‘‘fixational eye movements are not an index of covert attention.’’ We show that microsaccade direction is a re...
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Fixational eye movements are subdivided into tremor, drift, and microsaccades. All three types of miniature eye movements generate small random displacements of the retinal image when viewing a stationary scene. Here we investigate the modulation of microsaccades by shifts of covert attention in a classical spatial cueing paradigm. First, we replicate the suppression of microsaccades with a min...
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Shifts of covert attention differ depending on whether the shift is exogenously or endogenously motivated. The present study examined whether crossing imaginary meridia in the visual field influences shifts directed by central or peripheral cues. A two-alternative forced-choice discrimination task was employed under direction from 70 % valid central and peripheral cues. In comparison to central...
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ژورنال
عنوان ژورنال: Vision Research
سال: 2002
ISSN: 0042-6989
DOI: 10.1016/s0042-6989(02)00263-8