You are in your psychology class, discussing the visual system, and the teacher decides to play a round of "Jeopardy!" with the class
The teacher states, "And the answer is…. this person developed the opponent-process theory of color vision." What should you state?
a) Who was Ewald Hering?
b) Who was Ernst Weber?
c) Who was Hermann von Helmholtz?
d) Who was Pietr DeVries?
ANS: A, Although Helmholtz proposed the trichromatic theory of color vision, Hering was responsible for the opponent-process theory.
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a. any amount b. very small doses c. moderate doses d. excessive doses