Visual tests to compare brightness and contrast of simple patterns (IMAGE)

University of Helsinki

Visual tests to compare brightness and contrast of simple patterns

Caption

The brightness of figures A and B is exactly the same, but they are perceived differently due to a difference in the background. This illusion was perceived similarly by the patients and healthy control subjects. The contrast of figures C and D is exactly the same as well, but they are perceived differently. The perception of this illusion was weaker among the depressed patients than the control subjects.

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Viljami Salmela

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