Varying Cue-Stimulus Interval Does Not Affect the Sensory Discrimination Performance in the Antisaccade Task

Whether stimulus discrimination increases, decreases, or varies periodically as a function of cue-stimulus interval (CSI) is debated. Two experiments varied CSI in the antisaccade task between 400 and 900 ms in 8/16-ms steps. Neither trend nor oscillation in accuracy across CSIs was observed, suggesting no fluctuation of vigilance before stimulus.