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: something that deceives or misleads intellectually. b (1) : perception of something objectively existing in such a way as to cause misinterpretation of its actual nature. (2) : hallucination sense 1. (3) : a pattern capable of reversible perspective. 2. a (1) : the state or fact of being intellectually deceived or misled : misapprehension. (2)
- Overview
- The nature of illusions
- Stimulus-distortion illusions
illusion, a misrepresentation of a “real” sensory stimulus—that is, an interpretation that contradicts objective “reality” as defined by general agreement. For example, a child who perceives tree branches at night as if they are goblins may be said to be having an illusion. An illusion is distinguished from a hallucination, an experience that seems...
Illusions are special perceptual experiences in which information arising from “real” external stimuli leads to an incorrect perception, or false impression, of the object or event from which the stimulation comes.
Some of these false impressions may arise from factors beyond an individual’s control (such as the characteristic behaviour of light waves that makes a pencil in a glass of water seem bent), from inadequate information (as under conditions of poor illumination), or from the functional and structural characteristics of the sensory apparatus (e.g., distortions in the shape of the lens in the eye). Such visual illusions are experienced by every sighted person.
This type of illusory sense perception arises when the environment changes or warps the stimulus energy on the way to the person, who perceives it in its distorted pattern (as in the case of the “bent” pencil referred to above).
- Louis Jolyon West
An illusion is a distortion of the senses, which can reveal how the mind normally organizes and interprets sensory stimulation. Although illusions distort the human perception of reality, they are generally shared by most people.
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ILLUSION definition: 1. an idea or belief that is not true: 2. something that is not really what it seems to be: 3. an…. Learn more.
an idea or belief that is not true, or something that is not what it seems to be: We have no illusions about how difficult the job will be. [ + that clause ] I was under the illusion that trains ran frequently on weekends (= I wrongly believed this). They managed to create the illusion of space in a tiny apartment.
May 1, 2024 · Optical illusions can be fun, but they're also a great way to learn more about the brain and perception. Explore ten cool optical illusions and learn how they work.
