News tagged with illusion
(Medical Xpress)—Optical illusions abound in human visual perception, as demonstrated by the following well-known examples. Although many are static illusions, motion illusions also occur. Recently, scientists ...
Neuroscience Apr 23, 2013 | 3 / 5 (2) | 2 |
Anything you can do I can do better: Neuromolecular foundations of the superiority illusion (Update)
(Medical Xpress)—The existential psychologist Rollo May wrote that "depression is the inability to construct a future"1 while Lionel Tiger stated that "optimism has been central to the process of human e ...
Neuroscience Apr 02, 2013 | 4.5 / 5 (11) | 5 |
Scientists from Royal Holloway University have found that when white Caucasians are under the illusion that they have a dark skin, their racial bias changes in a positive way.
Psychology & Psychiatry May 14, 2013 | 2 / 5 (1) | 0
(Medical Xpress) -- We experience an interesting phenomenon when the contrast of an image flickers as it moves across our visual field namely, an illusory reversal in the direction of motion. Moreover, ...
Neuroscience Jun 22, 2011 | 5 / 5 (3) | 0 |
A study using a procedure called the rubber hand illusion has found striking new evidence that people experiencing schizophrenia have a weakened sense of body ownership and has produced the first case of a ...
Psychology & Psychiatry Oct 31, 2011 | 5 / 5 (14) | 5 |
(Medical Xpress) -- Scientists have come up with new insight into the brain processes that cause the following optical illusion:
Neuroscience Jun 27, 2011 | 4.4 / 5 (9) | 3 |
(Medical Xpress) -- We all know that our pupils contract when our eyes are exposed to increases in the brightness of light. The reason is to both protect the delicate inner workings of our eyes and to help ...
Neuroscience Jan 25, 2012 | 4.8 / 5 (6) | 2 |
The sensation of having a physical body is not as self-evident as one might think. Almost everyone who has had an arm or leg amputated experiences a phantom limb: a vivid sensation that the missing limb is still present. ...
Neuroscience Apr 11, 2013 | 5 / 5 (3) | 2 |
Most people believe they can multitask effectively, but a University of Utah study indicates that people who multitask the most – including talking on a cell phone while driving – are least capable of ...
Psychology & Psychiatry Jan 23, 2013 | 4.5 / 5 (12) | 4 |
(Medical Xpress) -- Researchers at the University of Sydney have thrown new light on the tricks the brain plays as it struggles to make sense of the visual and other sensory signals it constantly receives.
Neuroscience Apr 24, 2012 | 4.5 / 5 (2) | 0 |
(Medical Xpress) -- Our interpretation of the world around us may have more in common with the impossible staircase illusion than it does the real world, according to research published today in the open access ...
Psychology & Psychiatry Mar 23, 2012 | 4.6 / 5 (5) | 6 |
Supposedly 'primitive' reflexes may involve more sophisticated brain function than previously thought, according to researchers at Imperial College London.
Neuroscience Feb 14, 2013 | 5 / 5 (1) | 0 |
(Medical Xpress) -- When we gaze at a shape and then the shape disappears, a strange thing happens: We see an afterimage in the complementary color. Now a Japanese study has observed for the first time an equally strange ...
Psychology & Psychiatry Nov 08, 2011 | 4 / 5 (4) | 0 |
One cup or two faces? What we believe we see in one of the most famous optical illusions changes in a split second; and so does the path that the information takes in the brain. In a new theoretical study, ...
Neuroscience Mar 23, 2012 | 4.8 / 5 (8) | 1 |
Barrow Neurological Institute researchers Jorge Otero-Millan, Stephen Macknik, and Susana Martinez-Conde share the recent cover of the Journal of Neuroscience in a compelling study into why illusions trick our brains. Barrow ...
Neuroscience May 01, 2012 | 4 / 5 (3) | 0 |
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.
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