Figure 4.

The effect of cartoon-face adaptation on curvature judgment (experiment 1). a, Psychometric functions from a naive subject under the following conditions. 0-c, No adaptation baseline (blue); c-c, adaptation to the most concave curve (green); f-c, adaptation to the saddest face, whose mouth was identical to the most concave curve (red). For each condition, the fraction of convex responses was plotted as a function of the curvature of the test curves. b, Summary of all four subjects' data. For each condition, the average PSE relative to the baseline condition and the SEM were plotted. The p value shown for each condition in the figure was calculated against the baseline condition using the two-tailed paired t test.