Abstract
Using a method of direct magnitude estimation, perceived brightness was measured in the dark-adapted eye with brief flashes of varying duration (1–1,000 msec), size (16’–116’), and retinal loci (0°–60°) for the lower photopic luminance levels covering the range between 8.60 and 86 cd/m2 in steps of .5 log units. Perceived brightness increased as a function of flash duration as well as luminance up to approximately 100 msec, then remained constant above 100 msec. The enhancement of brightness at about a 50-msec flash duration has been observed not in the fovea but in the periphery. Target size also has been found to be effective on brightness.
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Stevens, S. S., & Stevens, J. C.The dynamics of visual brightness. Psychophysical project, Harvard University, 1960.
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Osaka, N. Perceived brightness as a function of flash duration in the peripheral visual field. Perception & Psychophysics 22, 63–69 (1977). https://doi.org/10.3758/BF03206081
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DOI: https://doi.org/10.3758/BF03206081