There’s too much information available in the retinal input for our visual system to be able to process everything. Which of the following helps us to overcome this major problem?

⚪ a. Gist representations

⚪ b. The reorganization of visual information by hemifield at the optic chiasm

⚪ c. Attentional selection

⚪ a & b

⚪ a & c

1. Zachary was born with a rare visual defect. He has no cone photoreceptors in his retina, there are only rods. Assuming that all other aspects of his visual system are normal, which of the following would characterize Zachary's vision? A) poor visual acuity B) an inability to differentiate between black and white C) a difficulty seeing in low light conditions D) colour blindness E) both A) and D)

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

6. Compared with unconscious information processing, conscious information processing is relatively a. fast and especially effective for solving simple problems. b. slow and especially effective for solving simple problems. c. fast and especially effective for solving complex problems. d. slow and especially effective for solving complex problems.