Does contrast disparity alone generate stereopsis?

@article{Blake1979DoesCD,
  title={Does contrast disparity alone generate stereopsis?},
  author={Randolph Blake and Robert H. Cormack},
  journal={Vision Research},
  year={1979},
  volume={19},
  pages={913-915}
}
In two experiments. one using a nulling technique and the other forced-choice testing. observers judged the rotation in depth of dichoptically-viewed vertical gratings of unequal contrast. In neither experiment was evidence found for a stereoscopic sensation of depth based on contrast disnarity alone; spatial frequency disparity, on the other hand produced a clear rotation of the fused . percept about th; vertical axis. Stereopsis, the uniquely binocular sense of depth perception, can be… CONTINUE READING