Effects of stimulus material on the Fröhlich illusion

  title={Effects of stimulus material on the Fr{\"o}hlich illusion},
  author={Dirk Kerzel and Jochen M{\"u}sseler},
  journal={Vision Research},
In the Fröhlich illusion, judgements of the first position of a moving object are typically displaced in the direction of motion. The illusion has been obtained with linear motion of a small target, and with rotary motion of a spatially extended line. We compared judgements of the initial orientation of a small dot and a line that rotated around the point of fixation. The illusion was absent with the dot, whereas it was reliably obtained with the line. When the density of the line was reduced… CONTINUE READING

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