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Discussion

Read each of the following two statements-Assertion (A) and Reason (R) and indicate your answer using the codes given below :

Assertion (A) : In Ponzo illusion and Muller-Lyer illusion, linear perspective is misapplied to the display.
Reason (R) : According to Gregory perception is only a function of stimulus characteristics.
Codes :

  • A.(A) is true and (R) is false.
  • B.Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  • C.(A) is false and (R) is true.
  • D.Both (A) and (R) are true and (R) is the correct explanation of (A).

Answer: A

The Assertion is true and the Reason is false.

In the Ponzo and Muller-Lyer illusions the lines carry depth cues of linear perspective which are misapplied to a flat display, and so the Assertion is accepted.

Gregory's view is that perception is a constructive process in which the brain forms hypotheses from past experience and the stimulus, not a function of stimulus characteristics alone, so the Reason is false.

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