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  2. Subjective constancy - Wikipedia

    en.wikipedia.org/wiki/Subjective_constancy

    Distance constancy refers to the relationship between apparent distance and physical distance. [8] An illusion example of this would be the moon - when it is near the horizon it is perceived as larger (size constancy) and/or closer to earth than when it is above our heads. Location constancy refers to the relationship between the viewer and the ...

  3. Emmert's law - Wikipedia

    en.wikipedia.org/wiki/Emmert's_law

    Emmert's law has been used to investigate the moon illusion (the apparent enlargement of the moon or sun near the horizon compared with higher in the sky). [7] [8] A neuroimaging study that examined brain activation when participants viewed afterimages on surfaces placed at different distances found evidence supporting Emmert's Law and thus size constancy played out in primary visual cortex ...

  4. Shepard tables - Wikipedia

    en.wikipedia.org/wiki/Shepard_tables

    The MIT Encyclopedia of the Cognitive Sciences explains the illusion as an effect of "size and shape constancy [which] subjectively expand[s] the near-far dimension along the line of sight." [4] It classifies Shepard tables as an example of a geometrical illusion, in the category of an "illusion of size." [4]

  5. Müller-Lyer illusion - Wikipedia

    en.wikipedia.org/wiki/Müller-Lyer_illusion

    In the Müller-Lyer illusion, the visual system would in this explanation detect the depth cues, which are usually associated with 3D scenes, and incorrectly decide it is a 3D drawing. Then the size constancy mechanism would make us see an erroneous length of the object which, for a true perspective drawing, would be farther away.

  6. Depth perception - Wikipedia

    en.wikipedia.org/wiki/Depth_perception

    Perspective, relative size, occultation and texture gradients all contribute to the three-dimensional appearance of this photo. Depth perception is the ability to perceive distance to objects in the world using the visual system and visual perception.

  7. Geometrical-optical illusions - Wikipedia

    en.wikipedia.org/wiki/Geometrical-optical_illusions

    The moon illusion is a good example. Before invoking concepts of apparent distance and size constancy, it helps to be sure that the retinal image hasn't changed much when the moon looks larger as it descends to the horizon. Once the signals from the retina enter the visual cortex, a host of local interactions are known to take place.

  8. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    2010 Patrick at Winter Commencement at the University of Kentucky, where he majored in sociology and minored in psychology. 2008 Patrick and his mother celebrating his 21st birthday. 2003 Patrick with his mother at an Easter dinner.

  9. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    Colour constancy is an example of subjective constancy and a feature of the human color perception system which ensures that the perceived color of objects remains relatively constant under varying illumination conditions. A green apple for instance looks green to us at midday, when the main illumination is white sunlight, and also at sunset ...