Sleep colors your view of the world: Study suggests sleep may restore color perception
ScienceDaily (2010-06-10) -- Prior wakefulness caused the color gray to be classified as having a slightly but significantly greenish tint. Overnight sleep restored perception to achromatic equilibrium so that gray was perceived as gray. The study involved five people who viewed a full-field, homogenous stimulus of either slightly reddish or greenish hue. The observers had to judge whether the stimulus was greener or redder than their internal perception of neutral gray. ... > read full article
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