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Perceptual Illusions

Müller-Lyer illusion - illusion of line length that is distorted by inward-turning or outward-turning corners on the ends of the lines, causing lines of equal length to appear to be different.

Moon illusion – the moon on the horizon appears to be larger than the moon in the sky.

Apparent distance hypothesis

Illusions of Motion:

autokinetic effect - a small, stationary light in a darkened room will appear to move or drift because there are no surrounding cues to indicate that the light is not moving.

stroboscopic motion - seen in motion pictures, in which a rapid series of still pictures will appear to be in motion.

phi phenomenon – lights turned on in a sequence appear to move.

LO 3.16  Visual illusions

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