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Identify the phenomenon that allows us to recognise familiar stimuli under varying conditions.

  • A.Perceptual constancies
  • B.Perceptual set
  • C.Perceptual schema
  • D.Gestalt principle

Answer: A

Perceptual constancies allow us to recognise familiar stimuli, such as the shape, size and brightness of an object, under varying conditions of distance, angle and lighting. Perceptual set is a readiness to perceive in a certain way, perceptual schema is an organised mental framework, and Gestalt principles describe how parts are grouped. Size constancy, shape constancy and brightness constancy are examples: a distant person looks smaller on the retina but we still see the person as of normal size.

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