title: Psychophysical measurement of cortical color mechanisms not sensitive to spatial frequency.
abstract: Virus and Haapasalo report that the Blakemore and Sutton apparent spatial-frequency shift is not color specific. Also supposedly demonstrated is a McCollough effect that is not possible to spatial frequency. It is suggested that inadequate test procedures and a confusion between retinal and cortical adaptation negate these results.
mesh_terms: D000221:Adaptation, Ocular; D000360:Afterimage; D003118:Color Perception; D006801:Humans; D013028:Space Perception