Fig. 1 shows a black-and-white design displayed on the wall of a rehabilitation clinic. Some patients report seeing a white vase first, whereas others repor...
Question 1 Report
Fig. 1 shows a black-and-white design displayed on the wall of a rehabilitation clinic. Some patients report seeing a white vase first, whereas others report two dark profiles facing each other. The therapist asks patients to switch deliberately between the two interpretations.
(a) Name the perceptual organisation principle illustrated. [1]
(b) Explain why patients cannot normally perceive both interpretations at exactly the same moment. [3]
(c) Outline what this figure suggests about figure-ground perception. [2]
Answer Details
(a) Figure-ground organisation / figure-ground segregation [1] (b) Attention usually selects one region as the figure [1]; the other region is treated as background [1]; the same boundary is assigned to one interpretation at a time, so perception switches between vase and faces [1]. (c) The visual system separates a meaningful object from its background [1]; this assignment can be reversible when information is ambiguous [1].
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