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What is the effect of 'closure' in the context of perception?

  1. The process of organizing stimuli into groups

  2. The effect of filling in gaps to create a complete whole object

  3. The realization of an object being nearer than it appears

  4. The ability to detect changes in environment

The correct answer is: The effect of filling in gaps to create a complete whole object

Closure refers to the perceptual tendency to mentally complete incomplete objects or patterns based on prior knowledge or experience. In this context, it is referring to the effect of filling in gaps in a visual scene to create a complete whole object. This process allows us to perceive objects as whole and helps us make sense of our visual environment. Options A, C, and D are incorrect because they do not accurately describe the effect of closure in perception. Option A describes the process of grouping stimuli, which is a different perceptual tendency. Option C refers to the phenomenon of an object appearing closer than it actually is, known as size constancy. Option D describes the ability to detect changes in the environment, which is a different aspect of perception.