Discrimination of geometric angle in the fronto-parallel plane.

  title={Discrimination of geometric angle in the fronto-parallel plane.},
  author={Herman P. Snippe and Jan J. Koenderink},
  journal={Spatial vision},
  volume={8 3},
This study determines the sensitivity of human observers to 2D fronto-parallel angles. Angle discrimination thresholds vary as a function of base angle and stimulus configuration orientation. However, these variations can all be understood from the well-known meridional anisotropy for orientation discrimination of the orientations that define the angle. Specifically, observers do not show any special sensitivity to angles of 90 degrees and 180 degrees (straightness). Instead it is claimed that… CONTINUE READING

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