- McCollough effect
- an aftersensation of color; following exposure to vertical and horizontal lines of differing colors, a grid of vertical and horizontal black lines may be seen as edged with the previously seen colors.
Medical dictionary. 2011.
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McCollough effect — (click to enlarge) A test image for the McCollough effect. On first looking at this image, the vertical and horizontal lines should look black and white, colourless. After induction (see images below), the horizontal lines should look greenish… … Wikipedia
mccollough effect — The eponym McCollough effect refers to the American scientist Celeste McCollough Howard, who described the concomitant phenomenon in 1965. The McCollough effect is classified as a contingent aftereffect. It can be induced by the alternate… … Dictionary of Hallucinations
Celeste McCollough — Celeste McCollough, known since about 1996 as Celeste McCollough Howard is an American scientist who conducts research in human visual perception. She is famous for discovering, in 1965, the first contingent aftereffect, known soon after as the… … Wikipedia
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Contingent perceptual aftereffect — Contingent aftereffects are studied in human perception and can be defined as illusory percepts that are apparent on a test stimulus after exposure to an induction stimulus for an extended period. Contingent aftereffects can be contrasted with… … Wikipedia
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McCullough — People with the surname McCullough: Bernie Mac (1957 2008), comic actor born Bernard McCullough Billy McCullough (born 1935), former Northern Ireland footballer Clyde McCullough (1917 1982), Irish baseball player Colleen McCullough (born 1937),… … Wikipedia
aftereffect — Also known as aftersensation and perceptual aftereffect. All three terms refer to the illusory visual perception that may follow prolonged exposure to a particular visual stimulus. As a rule, aftereffects present themselves in the inverted… … Dictionary of Hallucinations
contingent aftereffect — Also known as contingent perceptual aftereffect. Both terms are used to denote a type of aftereffect that is dependent on (i.e. contingent with) the orientation of the perceived object with respect to the retina. An example is the * McCollough … Dictionary of Hallucinations
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