Brightness and Darkness as Perceptual Dimensions
Figure 5
Model Predictions for the Reversed-Polarity Experiment (Experiment Two)
The model predicts that subjects will rate ring pairs as identical only when the grey shades associated with reference (colored disks) and matching (black squares) coincide in grey space (A,C). Otherwise, the model predicts that perfect matches will not be possible (B,D). The black square in (D) does not coincide exactly with the position of a yellow disk, although it is very close.