Confusable gratings selectively elicit orientation-contingent colour aftereffects

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Abstract
Induction of orientation‐selective colour aftereffects (the McCollough effect) was studied with groups of young children who differed in their ability to discriminate an oblique grating from its mirror‐image under recognition conditions. If the McCollough effect is generated through associative learning, children who failed to learn simple identifying responses to oblique lines as a function of the direction in which the lines point should also fail to associate colour lablels selectively to these same stimuli. Instead, the ease with which the McCollough effect was induced by alternate exposure to left‐oblique lines in green light and right‐oblique lines in red light was independent of the ability of the young child to discriminate direction of line under recognition conditions.

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