The perception of object versus objectless motion.

  title={The perception of object versus objectless motion.},
  author={Howard S. Hock and David F. Nichols},
  journal={Attention, perception & psychophysics},
  volume={75 4},
Wertheimer, M. (Zeitschrift für Psychologie und Physiologie der Sinnesorgane, 61:161-265, 1912) classical distinction between beta (object) and phi (objectless) motion is elaborated here in a series of experiments concerning competition between two qualitatively different motion percepts, induced by sequential changes in luminance for two-dimensional geometric objects composed of rectangular surfaces. One of these percepts is of spreading-luminance motion that continuously sweeps across the… CONTINUE READING
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