Figure 3.

Testing for invariance of relative color similarities across adaptation conditions (Experiment 3): (A) Planar display with beam-splitter superimposing lights from two screens: A full-field red in the top display is combined with the test stimulus in the bottom, allowing test stimulus and task to stay unchanged under different adaptation conditions. (B, left) Chromaticities of the nine different superimposed full fields (in roughly corresponding colors) with the tested color quadrilaterals. (B, right) Chromaticity coordinates of the lights from test quadrilaterals superimposed with different full-field illuminants (in roughly corresponding colors). (C) Results plotted in the chromaticities of the test monitor for all full-field illuminants. Observers' chosen midpoints are shown color coded according to the illuminant under which they were measured and connected to their respective test vertices, top row for the square and bottom row for the diamond (black diamond symbols as in Figure 3B). Ellipses show the standard deviation of settings, color-coded for the full-field light.