PSYC 3702 Study Guide - Midterm Guide: Inkjet Printing, Lux, Receptive Field
12 Dec 2017
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Psyc3702 midterm questions: compare and contrast bottom up" and top down" influences on perception. Top down information is the observers" knowledge, expectations and goals, which can affect perception whereas bottom up information is contained in neural signals from receptors. On a printed page viewed under standard office level illumination (500 lux) the luminance of the white paper was measured to be 80 cd/m2 whereas the luminance of the black ink was measured to be 5 cd/m2. The page was then taken outside on a sunny day where the illumination level was 10,000 lux. The luminance of the white paper was measured to be 1600 cd/m2 outside. Calculate the luminance of the black ink under the same lighting conditions. White paper is 16x higher than black in: (point form ok) compare and contrast fechner"s law with stevens" law. Fechners law: where perceived intensity of a stimulus changes as its physical intensity changes.
