Abstract
Perceptual latency to a foveal stimulus was determined with the perceived-order method. In Experiment 1, luminance ranged from 29 to 114,000 td, stimulus durations ranged from 2 to 2,500 msec, and all stimuli were 100% detectable. One observer showed no significant duration effect, and the other showed a significant, but irregular, effect. In Experiment 2, absolute threshold was determined at the same durations, and perceptual latencies were subsequently determined with luminance.1 log above absolute threshold (100% detectable). Latencies increased at long durations for both observers. This result can probably best be explained in terms of probability summation.
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This paper is based on the first author’s dissertation, which was performed in partial fulfillment of the doctoral degree at Tulane University. This work was supported by Grant EY00021 from the National Eye Institute, U.S. Public Health Service, to the second author. The data were presented at the annual meeting of the Optical Society of America, October 1974.
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Lewis, J.H., Matteson, H.H. & Dunlap, W.P. Effects of stimulus duration on perceptual latency in the fovea. Bull. Psychon. Soc. 9, 176–178 (1977). https://doi.org/10.3758/BF03336965
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DOI: https://doi.org/10.3758/BF03336965