A New and Moving Experience

Attention, Perception and Psychophysics, May 2010 | Go to article overview

A New and Moving Experience


MOTION PERCEPTION

Hu & Victor (2010). A set of high-order spatiotemporal stimuli that elicit motion and reverse-phi percepts. J Vis, 10(3):9. doi:10.1167/10.3.9

Vast effort has been devoted to understanding how we sense visual motion. One might think that before motion can be detected, the object that moves must be identified. Braddicks (1974, Vis Res 14:519) classic experiments with random dot kinematograms made it clear that human vision has at least one motion- sensing system for which this is not true. This short-range system is directly sensitive to shifts in the pattern of luminance playing across the visual field (no preidentified object required). Various models were proposed to explain the motion sensing performed by this system (e.g., Adelson & Bergen, 1985, J Opt Soc Am A 2:284; van Santen & Sperling, 1984, J Opt Soc Am A 1:451; Watson & Ahumada, 1985, J Opt Soc Am A 2:322), and it soon became clear that these models were all consonant with the natural idea that the short-range system is driven by cross-correlating the pattern of light on the retina with the pattern of light an instant before at a slightly different location, as had been proposed by Reichardt (1961, pp. …

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