PSY280H1 Lecture Notes - Lecture 9: Sigmund Exner, Comparator, Rapid Eye Movement Sleep
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Document Summary
Computation of visual motion: motion is a change in position over time. We have receptors to detect motion. (eg. v1 cells that"s motion dependent. ) A simple motion detection circuit proposed by werner reichardt (1950s). Fires only if signals from both detectors(d) arrive at the comparator(x) at the same time. Tuned to particular speeds and specific directions of motion. There isn"t true motion in the display, and so does not need real motion in order to fire. First demonstrated by sigmund exner in 1875. Our ability to detect motion is based on 3 factors: isi, soa, displacement. Perceptual phase space: succession, apparent motion, simultaneity. The targets of apparent motion can differ along several possible stimulus dimensions. The target of apparent motion changes shapes. The effect of context: motion entrainment: the addition of flanker dots causes the center dot to appear in motion behind a square occlude, first order and second order motion.
