An optical illusion is a type of illusion characterized by visually perceived images that are deceptive or misleading [1]. Information gathered by the eye is interpreted by the brain to give the perception that something is present when it is not. There are physiological illusions, that occur naturally, and cognitive illusions, that can be demonstrated by specific visual tricks that show particular assumptions in the human perceptual system [2]. Optical illusion - Physiological illusions. Physiological i ...

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Optical illusion - Physiological illusions Optical illusion - Cognitive illusions

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Cognitive illusions are often better known. Instead of demonstrating a physiological base they interact with different levels of perceptual processing, in-built assumptions or 'knowledge' are misdirected. Cognitive illusions are commonly divided into ambiguous illusions, distorting illusions, paradox illusions, or fiction illusions. They often exploit the predictive hypotheses of early visual processin ...

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Optical illusion, Optical illusion - Physiological illusions, Optical illusion - Cognitive illusions

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Certain images are interpreted by the Visual system in more than one way. These visual patterns are thus called ambiguous images that are famous for inducing the phenomenon of multistable perception. Some often used synonymous terms are reversal images, puzzle images and perceptual rivalry. See also. Multistable perception Visual Perception Optical illusion Binocular rivalry Monocular rivalry Cognitive neuroscience < ...

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An illusion is a distortion of a sensory perception. Each of the human senses can be deceived by illusions, but visual illusions are the most well known. Some illusions are subjective; different people may experience an illusion differently, or not at all. Optical illusions, such the use of false perspective, exploit assumptions made by the human visual system. Mirages are optical distortions through the atmosphere that may be photographed. While the perceived reality (such as water in the desert) is illusory, th ...

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Senses are the physiological methods of perception. The senses and their operation, classification, and theory are overlapping topics studied by a variety of fields, most notably neuroscience, cognitive psychology (or cognitive science), and philosophy of perception. Sense - Definition of sense. There is no firm agreement among neurologists as to exactly how many senses there are, because of differing definitions of a sense. In general, one can say that a "sense" is a faculty by which outside stimuli ...

Including:

Sense - Definition of sense Sense - List of Human senses
Sense - Special senses Sense - Somatic senses Sense - Other
Sense - Non-human senses

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A color circle is a way of representing the visible spectrum in a circular form, with colors arranged in sequence around the circumference in order of spectral frequency. Analogous to the use of a color wheel in art, the color circle performs a different purpose, as it is a psychophysical tool used in the exploration of visual perception, its anomalies and optical illusions connected with color vision. A normal color circle will appear with red at one end of the spectrum and violet at the other, and with a wedge-shaped gap repr ...

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The Brocken bow, also called Brocken spectre or Mountain spectre, observed and described by Johann Esaias Silberschlag in 1780, is the apparently enormously magnified shadow of an observer cast, when the Sun is low, upon the upper surfaces of clouds that are below the mountain upon which he stands. The apparent magnification of size of the shadow is an optical illusion that occurs when the observer judges his shadow on relatively nearby clouds to be at the same distance as faraway land objects seen through gaps in the cl ...

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An afterimage is an optical illusion that occurs after looking away from a direct gaze at an image. This is closely related to the phenomenon called the persistence of vision, which is used in animation and cinema. One of the most common afterimages is the bright glow that seems to float before one's eyes after staring at a light bulb or a headlight for a few seconds. Afterimages are caused when the eye's photoreceptors, primarily those known as cone cells, "tire" from the over stimulation and lose sensitivity. Normally the eye ...

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The wagon-wheel effect, sometimes called the waggon-wheel effect, or the stagecoach-wheel effect, is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation. This last form of the effec ...

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Wagon-wheel effect - Wagon-wheel effect under stroboscopic conditions Wagon-wheel effect - Wagon-wheel effect under continuous illumination

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There is no firm agreement among neurologists as to exactly how many senses there are, because of differing definitions of a sense. In general, one can say that a "sense" is a faculty by which outside stimuli are perceived. School children are routinely taught that there are five senses (sight, hearing, touch, smell, taste; a classification first devised by Aristotle), it is generally agreed that there are at least nine different senses in humans, and a min ...

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Sense, Sense - Definition of sense, Sense - List of Human senses, Sense - Special senses, Sense - Somatic senses, Sense - Other, Sense - Non-human senses

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Using this definition several senses can be identified. Based on this outline and depending on the chosen method of classification, somewhere between 9 and 21 human senses have been identified. In addition, there are some other candidate physiological experiences which may or may not fall within the above classification (for example the sensory awareness of hunger and thirst). Finally, some individuals report synesthesia, the "crossing-over" of one sense to another, or even of senses associated with certain pure concepts. For example, the letter "A" may appear "black," certain no ...

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Sense, Sense - Definition of sense, Sense - List of Human senses, Sense - Special senses, Sense - Somatic senses, Sense - Other, Sense - Non-human senses

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Other living organisms have receptors to sense the world around them, including many of the senses listed above for humans. However, the mechanisms and capabilities vary widely. Among non-human animals, dogs have a much keener sense of smell than humans, although the mechanism is similar. Pit vipers and some boas have organs that allow them to detect infrared light, such that these snakes are able to sense the body heat of their prey. This is, however, also just sight extended to include more frequencies. Insects have olfactory receptors on ...

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Sense, Sense - Definition of sense, Sense - List of Human senses, Sense - Special senses, Sense - Somatic senses, Sense - Other, Sense - Non-human senses

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Inner ear causes: benign paroxysmal postural vertigo labyrinthitis Meniere's disease perilymphatic fistula neurinoma of the acoustic nerve vestibular neuronitis Eye causes: new glasses optical illusions Neck causes: arthritis cervical vertigo Whiplash and other strains Central nervous system causes: arteria basilaris syndrome concussion migraine multiple sclerosis orthostati ...

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Dizziness, Dizziness - Causes

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Drawing from Chomsky and other evidence from linguistics as well as implications from optical illusions and philosophy of mind, Jerry Fodor became one of the most articulate proponents for modularity of mind with the 1983 publication of his monograph Modularity of Mind. Although he argued for the modularity of 'lower level' cognitive processes in Modularity of Mind he also argued that higher level cognitive processes are not modular since they have dissimilar properties. The Mind Doesn't Work That Way, a reaction t ...

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Modularity of mind, Modularity of mind - Fodor's Modularity of Mind

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The investigations developed at the beginning of the 20th century, based on traditional scientific methodology, divided the object of study into a set of elements that could be analyzed separately with the objective of reducing the complexity of this object. Contrary to this methodology, the school of Gestalt practiced a series of theoretical and methodological principles that attempted to redefine the approach to psychological research. The theoretical principles are the following: Principle of Totality - The cons ...

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Gestalt psychology, Gestalt psychology - Origins, Gestalt psychology - Theoretical framework and methodology, Gestalt psychology - Prägnanz, Gestalt psychology - Relationship to gestalt therapy

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Although Max Wertheimer is credited as the founder of the movement, the concept of Gestalt was first introduced in contemporary philosophy and psychology by Christian von Ehrenfels (a member of the School of Brentano). The idea of Gestalt has its roots in theories by Johann Wolfgang von Goethe, Immanuel Kant, and Ernst Mach. Both von Ehrenfels and Edmund Husserl seem to have been inspired by Mach's work Beiträge zur Analyse der Empfindungen (Contributions to the Analysis of the Sensations, 1886), in formulating their very similar concepts of Gestal ...

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Gestalt psychology, Gestalt psychology - Origins, Gestalt psychology - Theoretical framework and methodology, Gestalt psychology - Prägnanz, Gestalt psychology - Relationship to gestalt therapy

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The most basic rule of gestalt is the law of prägnanz. This law says that we try to experience things in as good a gestalt way as possible. In this sense, "good" can mean several things, such as regular, orderly, simplistic, symmetrical, etc. The other gestalt laws are: Law of Closure - Our mind adds missing elements to complete a figure. Law of Similarity - Our mind groups similar elements to an entity. The similarity depends on form, color, size and brightness of the elements. Law of Proxim ...

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Gestalt psychology, Gestalt psychology - Origins, Gestalt psychology - Theoretical framework and methodology, Gestalt psychology - Prägnanz, Gestalt psychology - Relationship to gestalt therapy

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The idea that the first humans were shaped from tree-trunks is apparently a part of the cyclic notions, where light and darkness relieve each other, separated by the semidarkness of the dawn and dusk. We all know the optical illusions of the twilight, where the outline of an object looks like a human being, an animal or some kind of living creature. But when we take a closer look we become aware that the o ...

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Ask and Embla, Ask and Embla - Symbolism, Ask and Embla - Micro cosmos

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Drawn curtains. An alley shot of a two story house with narrow siding. A tree dominates the left half of the photo. A strange (possibly broken... or ornamental) yellow birdfeeder in the upper right. The shed's bricks are visible along the mortises... indicating that the building is brick with paneling. (the "Brick Wall" album covers explained?) An interesting optical illusion is created in the interplay of birdfeeder and brick. ...

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Twelfth Apostle, Twelfth Apostle - Track Listing:, Twelfth Apostle - Album Cover Description, Twelfth Apostle - Reviews

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