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  2. Picture Exchange Communication System - Wikipedia

    en.wikipedia.org/wiki/Picture_Exchange...

    PECS begins with teaching a student to exchange a picture of a desired item with a communicative partner, who immediately honors the request. After the student learns to spontaneously request for a desired item, the system goes on to teach discrimination among symbols and then how to construct a simple sentence.

  3. Thatcher effect - Wikipedia

    en.wikipedia.org/wiki/Thatcher_effect

    By looking at the intermediate angles between upright and inverted, studies have explored the gradual or sudden appearance of the illusions. [9] [10] Sensitivity to the Thatcher illusion has been found in children, [11] including children with autism. [12]

  4. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. Hybrid image: A Hybrid image is an optical illusion developed at MIT in which an image can be interpreted in one of two different ways depending on viewing distance. Illusory contours

  5. McGurk effect - Wikipedia

    en.wikipedia.org/wiki/McGurk_effect

    The McGurk effect is very robust; that is, knowledge about it seems to have little effect on one's perception of it. This is different from certain optical illusions, which break down once one "sees through" them. Some people, including those that have been researching the phenomenon for more than twenty years, experience the effect even when ...

  6. Category:Optical illusions - Wikipedia

    en.wikipedia.org/wiki/Category:Optical_illusions

    An optical illusion is any illusion that deceives the human visual system into perceiving something that is not present or incorrectly perceiving what is present.

  7. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    Optical illusion is also used in film by the technique of forced perspective. Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.

  8. List of effects - Wikipedia

    en.wikipedia.org/wiki/List_of_effects

    Matthew effect (education) (education) Matilda effect (Research) Matthew effect (sociology) (adages) (social phenomena) (sociology of scientific knowledge) McClintock effect (menstruation) McCollough effect (optical illusions) McGurk effect (auditory illusions) (perception) (psychological theories) Meissner effect (levitation) (magnetism ...

  9. Positive visual phenomena - Wikipedia

    en.wikipedia.org/wiki/Positive_visual_phenomena

    The illusion that objects are smaller/larger than in reality. Retinal dysmetropsia is the most common type; however, migraine related dysmetropsia may be more common than appreciated. Unusual causes include cortex lesions and seizures.