منابع مشابه
Adaptive velocity tuning for visual motion estimation
In the brain, both neural processing dynamics as well as the perceptual interpretation of a stimulus can depend on sensory history. The underlying principle is a sensory adaptation to the statistics of the input collected over a certain amount of time, allowing the system to tune its detectors, e.g. by improving the sampling of the input space. Here we show how a generative formulation for the ...
متن کاملAccuracy of Visual Velocity Estimation by Reichardt Correlators
While the Reichardt correlator and its mathematical equivalents do not signal true image velocity, a great deal of experimental evidence establishes them as mechanisms for visual motion detection in insects, humans, and other animals. This study examines the accuracy with which Reichardt correlators can provide velocity estimates in an organism’s natural visual environment. I develop an analyti...
متن کاملMagnitude and velocity of proximal vergence.
Until recently proximal vergence was considered to play only a minor role in the eye alignment changes that occur when looking between distant and near targets. We measured the magnitude and velocity of proximal vergence using infrared limbal sensing to record vergence responses between two untextured luminous horizontal rods which lacked disparity and accommodative cues. The magnitude of proxi...
متن کاملReaction time to motion onset and magnitude estimation of velocity in the presence of background motion
Reaction times (RT) to motion onset of a target grating moving at 0.4, 0.6, 0.8, 1.0 or 1.6 °/s and magnitude estimation of the same velocities were studied in the presence of the surrounding background motion which was either in the same or opposite direction. Surprisingly, we found no relative motion effect: if the background motion, irrespective of its direction, affected the target, then it...
متن کاملPosition and Velocity Estimation in the Visual Cortex
Early extracellular recordings from turtle visual cortex have shown the existence of a wave of depolarizing activity as a response to a localized light ashes presented in the turtle visual eld. Experiments using voltage sensitive dye techniques have supported this observation. The dynamics of the cortical wave might be responsible for encoding the parameters of an unknown input stimulus. We dev...
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ژورنال
عنوان ژورنال: The Journal of Psychology
سال: 1972
ISSN: 0022-3980,1940-1019
DOI: 10.1080/00223980.1972.9916975