STATIONARY AND PURSUIT VISUAL FIXATION SHARE SIMILAR BEHAVIOR

Stationary and pursuit fixation may involve different fixation mechani sms that are reflected by differences in saccadic reaction times (SRTs ). Gap, Simultaneous, and Overlap interval paradigms provided three di stinct SRT ranges for comparisons between these two viewing conditions . SRTs following pursuit fixation were longer than following stationar y fixation, but were similarly affected by the interval paradigms. The SRT increase with smooth pursuit was largely explained by additional demands for programming oblique saccades. The paradigm dependent SRT r elationships also persisted after timing cues were minimized. These re sults indicate that stationary and pursuit fixation have similar respo nses to different fixation paradigms and do not implicate the existenc e of multiple fixation processes.