Spatial summation among coextensive and parallel line segments across wide separations (50 degrees): egocentric localization and the great circle model.

@article{Matin1994SpatialSA,
  title={Spatial summation among coextensive and parallel line segments across wide separations (50 degrees): egocentric localization and the great circle model.},
  author={Leonard Matin and Wei Li},
  journal={Vision research},
  year={1994},
  volume={34 19},
  pages={2577-98}
}
The elevation at which an observer sets a target to appear at eye level (VPEL) is systematically related to the angle of pitch of the visual field and is only a little less for a visual field consisting of a single line in darkness than for a complexly structured field [Matin and Li (1994a) Vision Research, 34, 311-330]. Three experiments are described which measure the quantitative characteristics of spatial summation among individual pitched-from-vertical line segments that control the visual… CONTINUE READING