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deinonychus commented on the word supernormal stimulus
A supernormal stimulus or superstimulus is an exaggerated version of a stimulus to which there is an existing response tendency, or any stimulus that elicits a response more strongly than the stimulus for which it evolved.
For example, a moth will spiral into a flame because it is adapted to navigate by the sun (a much more distant lightsource).
(WIkipedia)
January 21, 2012