Line-separation discrimination curve in the human fovea: smooth or segmented?
Because the discriminability of spatial intervals may give a pointer to possible underlying detection mechanisms for hyperacuity, a careful measurement was undertaken of how this function behaves with the width of the spatial intervals in the 6- to 12-min-of-arc range. Data on two subjects failed to produce convincing evidence for significant segmentation in the line-separation discrimination curve.
D004192:Discrimination, Psychological; D005584:Fovea Centralis / Q000502:physiology*; D006801:Humans; D008266:Macula Lutea / Q000502:physiology*; D012684:Sensory Thresholds; D013028:Space Perception / Q000502:physiology*