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Visual induction occurs where one visual stimulus affects the perception of another adjacent stimulus. A number of effects have been identified:

• Brightness effects. So for example Mach bands may be perceived.
• Colour effects. The colour of one stimulus may be seen differently when placed against alternative objects of other colours. See color contrast.
• Size effects. The perceived size of an object may be altered by placing it in proximity to alternative objects.

See alsoEdit

• Cornsweet illusion
• Simultaneous contrast