Opponent-process theory is a psychological and neurological model proposed in 1878 by Ewald Hering, a German physiologist, to account for a wide range of behaviors, including color vision; this model was expanded by psychologist Richard Solomon to explain opponent process theory.
Read more about Opponent-process Theory: Visual Perception, Motivation and Emotion
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“The great tragedy of science—the slaying of a beautiful theory by an ugly fact.”
—Thomas Henry Huxley (1825–1895)