Visual induction

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.