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Detection of incremental and decremental bars at different locations across Mach bands and related stimuli.

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83968

Hill,  NJ
Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Henning, G., Millar, R., & Hill, N. (2000). Detection of incremental and decremental bars at different locations across Mach bands and related stimuli. Journal of the Optical Society of America A, 17 (7), 1147-1159.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-E599-5
Zusammenfassung
Two-alternative forced-choice procedures were used to measure the detectability of bright and dark bars at various locations across luminance patterns that produced Mach bands. Detection performance was significantly affected by both dark and bright Mach bands: poor detection performance was observed at locations near, but not in, the Mach bands; relatively good detection performance at locations within the Mach bands was caused by reliable changes in the width, depth, or symmetry of the bands produced by the signal bars. The changes were apparent with signals of lower luminance than that needed for detection in the plateau regions far from the bands, but, because the cues were not sufficiently reliable to allow errorless performance, unusually shaped psychometric functions were obtained.