Detecting target shifts under uniform field flicker.
An experiment was performed in which a small target, viewed foveally, underwent 1 degree lateral shifts at quasi-random intervals. Subjects' response latency to the shift was investigated under various square-wave flicker conditions and compared to non-flickering conditions. Flicker was found to raise latencies, the effect peaking between 8 and 14 Hz. Under constant luminance difference between target and background the high target contrast phase was found to dominate the response cueing. The results are discussed in terms of a simple model of cumulative signal strength and adaptation processes.
Woodruff
C J
CJ
Materials Research Laboratory, Australian Defence Science & Technology Organisation, Melbourne.
Neill
R A
RA
D000328:Adult; D015350:Contrast Sensitivity / Q000502:physiology; D005425:Flicker Fusion / Q000502:physiology*; D006801:Humans; D008027:Light; D008297:Male; D008433:Mathematics; D011930:Reaction Time / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*