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KembaraXtra-Psychology – Baldwin Illusion
The Baldwin illusion is a visual distortion in which two horizontal lines of identical physical length are perceived as unequal because of the size of the squares or blocks that frame them. Specifically, a line extending between two large squares appears shorter than an equivalent line extending between two smaller squares. This illusion demonstrates how visual perception of size and distance is not determined solely by the retinal image but is strongly influenced by contextual cues and surrounding reference objects. The effect reveals the visual system’s tendency to interpret spatial information relationally rather than absolutely, relying on comparative judgments that can lead to systematic errors. Closely related to other size-contrast illusions such as the Zanforlin illusion, the Baldwin illusion has been used to illustrate fundamental principles of perceptual organization and the role of context in visual cognition.
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