Temporal Aspects of Eye Movement When Viewing Multiple Targets.
Interim rept. Oct 81-Sep 82,
MASSACHUSETTS INST OF TECH CAMBRIDGE MAN VEHICLE LAB
Pagination or Media Count:
A technique of eye position measurement and analysis was used to investigate the time necessary for processing visual information by comparing the mean response latency time of single targets to the response means of other novel stimuli. In all cases, stimuli were visual, context-free, point source targets, randomized for type, order of appearance, and time course. The separation of the visual fields is exploited to selectively present targets to either or both hemispheres. An asymmetry in single target left-right response latency time was observed in nearly all subjects. In all cases, there was a significant increase in response latency time when targets were presented to each hemisphere simultaneously. Delayed bihemispheric stimulation produced changes in response latency that were similar in both directions and the response latency increased still further when targets were presented sequentially. These studies helped to determine the timing of events prior to the execution of a saccade. The single and bihemispheric paradigms have also proven useful in studying the mechanisms and organization of visual information processing. Author