News tagged with illusion

Related topics: brain

When it comes to touch, to give is to receive

Have you ever touched someone else and wondered why his or her skin felt so incredibly soft? Well, now researchers reporting in the journal Current Biology on September 10 present evidence that this experience may often be ...

Sep 10, 2015
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Brain scan reveals out-of-body illusion

The feeling of being inside one's own body is not as self-evident as one might think. In a new study from Sweden's Karolinska Institutet, neuroscientists created an out-of-body illusion in participants placed inside a brain ...

Apr 30, 2015
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'Being Sigmund Freud'

The illusion of being in another body affects not only our perception (as is already known) but also our way of thinking. Thanks to virtual reality, some subjects embodied Sigmund Freud and proved better at giving themselves ...

Sep 17, 2015
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Virtual motion, real consequences

Ludwig Maximilian University of Munich researchers have shown that virtual optical stimuli can lead to aftereffects that significantly alter our perception of self-motion. This finding has implications for safe use of emerging ...

Nov 25, 2014
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An illusion is a distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation. While illusions distort reality, they are generally shared by most people. Illusions may occur with more of the human senses than vision, but visual illusions, optical illusions, are the most well known and understood. The emphasis on visual illusions occurs because vision often dominates the other senses. For example, individuals watching a ventriloquist will perceive the voice is coming from the dummy since they are able to see the dummy mouth the words. Some illusions are based on general assumptions the brain makes during perception. These assumptions are made using organizational principles, like Gestalt, an individual's ability of depth perception and motion perception, and perceptual constancy. Other illusions occur because of biological sensory structures within the human body or conditions outside of the body within one’s physical environment.

The term illusion refers to a specific form of sensory distortion. Unlike a hallucination, which is a distortion in the absence of a stimulus, an illusion describes a misinterpretation of a true sensation. For example, hearing voices regardless of the environment would be a hallucination, whereas hearing voices in the sound of running water (or other auditory source) would be an illusion.

Mimes are known for a repertoire of illusions that are created by physical means. The mime artist creates an illusion of acting upon or being acted upon by an unseen object. These illusions exploit the audience's assumptions about the physical world. Well known examples include "walls", "climbing stairs", "leaning", "descending ladders", "pulling and pushing" etc.

This text uses material from Wikipedia, licensed under CC BY-SA

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