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Illusions
Ehrenstein Illusion The most salient phenomenal attribute of the Ehrenstein illusion is the apparent brightness enhancement at the centre of the configuration, the latter being systematically perceived as brighter (Fig 1a) or as darker (Fig 1b) than the general background, the brightness enhancement effect being more pronounced than the darkness enhancement (Spillmann, Fuld, & Gerrits, 1976). These asymmetrical perceptual sensations of brightness/darkness…
