PSYCH 1XX3 Lecture Notes - Lecture 6: Real Image, Visual System, Cerebral Cortex

Critics of the trichromatic theory of colour vision have indicated that this theory has a major limitation. Which of the following statements MOST accurately reflects this limitation? A) Young and von Helmholtz were incorrect in assuming that cone photoreceptors in our retina are maximally responsive to a specific wavelength of light B) The trichromatic theory cannot explain the phenomenon of visual after-effects C) Rod photoreceptors in our retina, not cones, are responsible for the neural coding of colour D) Research has determined that there are actually six types of cones in the retina, rather than three as proposed by Young and Helmholtz E) Trichromatic theory cannot explain sensory adaptation

9. According to the principles of the "Opponent Process Theory of colour vision", if you stare at a red square for an extended period of time, and then focus on a blank white screen, you will see A) an after effect of a blue square B) an after effect of a yellow square C) an after effect of a green square D) an after effect of a black square E) nothing but a blank white screen