Figure 1.

(a) Face pool used in all experiments (three emotions, happy, sad, and angry; 47 morphs between each emotion). (b) Illustration of foveal occluder (Gaussian blob; 1.125° SD) relative to size of stimulus face. (c) Stimulus sequence for Experiment 1. Subjects began each trial by fixating a cross in the center of the screen for 700–1500 ms, after which time the stimulus array (24 emotional faces, see Methods) was presented for 1500 ms of free viewing. The fovea was either occluded (blue) or non-occluded (red). After 1500 ms, the stimulus was removed and subjects were able to adjust a face presented onscreen by moving the mouse through the entire 147-face pool.