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Sujal drives a car and correctly assesses the distance of an approaching automobile. What is the probable reason for this perceptual ability?

1. Depth perception
2. Distance perception
3. Monocular and binocular cues

  • A.Only 1 and 3
  • B.Only 1 and 2
  • C.Only 2
  • D.1,2 and 3

Answer: D

All three statements explain Sujal's ability, so the answer is 1, 2 and 3. Judging how far an approaching automobile is requires depth perception, which is the ability to see the world in three dimensions, and distance perception. It relies on monocular cues, such as relative size and interposition, and binocular cues, such as retinal disparity and convergence. Each of the three plays a part, so the options naming only some of them are incomplete.

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