Abstract
We measured the effect of a transient glare source on the perceived brightness of a standard luminance (LSTD) patch (0.5 cd/m2) as a function of the surround luminance (LS). In the experiment, both increment and decrement stimuli were dependent on the value of the LS (0.01, 0.2, 0.4, 0.6, 0.8, 1.0, 1.5, or 2.0 cd/m2). We adopted a magnitude comparison paradigm using constant stimuli to determine the test matching luminance (LM). When Ls was lower than the luminance of the patch, which corresponds to increments, LM was lower than LSTD, and this effect was highest for the lowest LS. There was a small but noticeable cusp as increments shifted to decrements. As Ls increased further (i.e., as the decrement grew), LM flattened out below LSTD. The overall pattern of results could be interpreted in terms of the concept ofcontrast brightness, with consideration of the intrinsic differences in brightness evaluations between decrements and increments.
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Issolio, L., Colombo, E.M. Brightness for different surround conditions: The effect of transient glare. Perception & Psychophysics 68, 702–709 (2006). https://doi.org/10.3758/BF03208769
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DOI: https://doi.org/10.3758/BF03208769