Effects of Target Size and Brightness and Fixation Point Size on Human Visually-Guided Voluntary Saccades
The peak velocity of saccades elicited by a visual target is known to be higher than that of saccades elicited by an invisible target (Smit et al. 1987; Smit and Van Gisbergen 1989). Other factors that may influence human saccades, however, are not well known. Therefore, the present study examines the relationship between saccades and the stimuli by which they are generated. This examination consisted of simultaneously presenting a fixation point and a saccade target directly in front of subjects. The subjects produced sac-cades from the fixation point to the target. Separate experiments were conducted in which the size and luminance of the target as well as the size of the fixation point were varied independently. This paper shows that the amplitude and peak velocity of the saccade vary according to the stimulus.
KeywordsPeak Velocity Superior Colliculus Saccade Target Normalize Peak Velocity Predictive Saccade
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