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  2. Subjective constancy - Wikipedia

    en.wikipedia.org/wiki/Subjective_constancy

    Subjective constancy or perceptual constancy is the perception of an object or quality as constant even though our sensation of the object changes. [1] While the physical characteristics of an object may not change, in an attempt to deal with the external world, the human perceptual system has mechanisms that adjust to the stimulus.

  3. 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]

  4. Rubin vase - Wikipedia

    en.wikipedia.org/wiki/Rubin_vase

    Another example of a bistable figure Rubin included in his Danish-language, two-volume book was the Maltese cross. A 3D model of a Rubin vase Rubin presented in his doctoral thesis (1915) a detailed description of the visual figure-ground relationship, an outgrowth of the visual perception and memory work in the laboratory of his mentor, Georg ...

  5. Feature integration theory - Wikipedia

    en.wikipedia.org/wiki/Feature_integration_theory

    Feature integration theory is a theory of attention developed in 1980 by Anne Treisman and Garry Gelade that suggests that when perceiving a stimulus, features are "registered early, automatically, and in parallel, while objects are identified separately" and at a later stage in processing.

  6. Figure–ground (perception) - Wikipedia

    en.wikipedia.org/wiki/Figure–ground_(perception)

    Movement also helps; the figure may be moving against a static environment. Color is also a cue because the background tends to continue as one color behind potentially multiple foreground figures, whose colors may vary. Edge assignment also helps; if the edge belongs to the figure, it defines the shape while the background exists behind the shape.

  7. Gestalt psychology - Wikipedia

    en.wikipedia.org/wiki/Gestalt_psychology

    Gestalt's theories of perception enforces that individual's tendency to perceive actions and characteristics as a whole rather than isolated parts, [13] therefore humans are inclined to build a coherent and consistent impression of objects and behaviors in order to achieve an acceptable shape and form.

  8. 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 ...

  9. Geometrical-optical illusions - Wikipedia

    en.wikipedia.org/wiki/Geometrical-optical_illusions

    Even if this does not fully account for an illusion, the step is helpful because it puts elaborate mental theories in a more secure place. 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 ...