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  2. 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. It is a major factor in perceiving the world in three dimensions

  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. Size consistency and size extensivity - Wikipedia

    en.wikipedia.org/wiki/Size_consistency_and_size...

    In quantum chemistry, size consistency and size extensivity are concepts relating to how the behaviour of quantum-chemistry calculations changes with the system size. Size consistency (or strict separability) is a property that guarantees the consistency of the energy behaviour when interaction between the involved molecular subsystems is nullified (for example, by distance).

  5. 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.

  6. Ebbinghaus illusion - Wikipedia

    en.wikipedia.org/wiki/Ebbinghaus_illusion

    The Ebbinghaus illusion or Titchener circles is an optical illusion of relative size perception. Named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909), the illusion was popularized in the English-speaking world by Edward B. Titchener in a 1901 textbook of experimental psychology, hence its alternative name. [ 1 ]

  7. Perceived visual angle - Wikipedia

    en.wikipedia.org/wiki/Perceived_visual_angle

    Angular size illusions are most obvious as relative angular size illusions, in which two objects that subtend the same visual angle appear to have different angular sizes; it is as if their equal-sized images on the retina were of different sizes. Angular size illusions are contrasted with linear size illusions, in which two objects that are ...

  8. Consistency - Wikipedia

    en.wikipedia.org/wiki/Consistency

    Because consistency of ZF is not provable in ZF, the weaker notion relative consistency is interesting in set theory (and in other sufficiently expressive axiomatic systems). If T is a theory and A is an additional axiom , T + A is said to be consistent relative to T (or simply that A is consistent with T ) if it can be proved that if T is ...

  9. Size constancy - Wikipedia

    en.wikipedia.org/?title=Size_constancy&redirect=no

    This page was last edited on 14 December 2012, at 05:02 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.