Figure 4.

Relative ratings as a function of test and adaptation times for the match condition with Face Set 1 and Face Set 2, and the mismatch condition for Face Set 2. In these plots, the grand mean rating was first subtracted for each subject to emphasize the relative trends as a function of these variables. (a) Relative ratings as a function of adaptation time (eight subjects, mean ± s.e.). (b) Relative ratings as a function of test duration (eight subjects, mean ± s.e.). (c) Relative ratings plotted on semi-log coordinates, as a function of adaptation duration. The results are shown for both match and mismatch conditions. See text for details. (d) Relative ratings plotted on semi-log coordinates, as a function of test stimulus duration.