Complex sentence: 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.
Split into simpler sentences: 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 the opponent process theory.