H Knau

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The time course and extent of brightness fading in a Ganzfeld were determined for adapting luminances ranging from 0.01 to 100 cd/m2. Magnitude estimation and interocular brightness matching were used. During Ganzfeld adaptation, perceived brightness decreased slowly and leveled off, on average, after 5-7 min (adapting time increasing with luminance). On(More)
Detection thresholds for luminance increments or decrements are normally related to rapid light changes. The goal of this study was to determine detection thresholds for slowly changing achromatic Ganzfeld luminances before and after adaptation to a constant Ganzfeld illumination, subsequently called Ganzfeld adaptation. During Ganzfeld adaptation,(More)
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