Illusory motion from shadows

Article Abstract:

Shadows affect the discernible three-dimensional motion of objects. The movement of an objects' shadow gives an impression of motion in the depth of the object even when the object is steady. An experiment with a checkerboard, with a square in its center, gives an impression of motion in the depth of the square when the shadow moves. The apparent motion is greater when the shadow has a penumbra, or when the source of light is from the top.

Observations, Depth perception, Motion perception (Vision), Motion perception, Shades and shadows

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Is subliminal learning really passive?

Article Abstract:

Subliminal learning is thought to occur through passive exposure to a stimulus. In challenging this theory, researchers discovered that perceptual learning improved when paired with relevant tasks that required conscious attention, and did not improve when paired with distractions.

Science & research, Subliminal perception

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Perceiving visual expansion without optic flow

Article Abstract:

Research is presented concerning the use of synthesized stochastic texture stimuli to investigate the use of scale-change information by the human eye. The estimation of expansion rates by observers is discussed.

Physiological aspects, Image processing, Letter to the Editor, Vision

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