Feature difference task
Matthew L Welchman Patten, Welchman, Andrew E · Harvard Dataverse · 2015
In the feature difference task, all dots in the random-dot stereogram were correlated and given a disparity. The surrounding disparity was presented at a crossed (near) disparity of 12 arcmin and was fixed for all trials. The central target plane varied relative to this plane, and appeared either 6, 18, 30, 60, 240 arcsec in front or behind this plane. We asked participants to judge the depth of the central plane relative to its surround while undergoing functional imaging of the visual cortex.