Smith et al. 10.1073/pnas.0508972103.

Fig. 6. Perceptual moments and their information content. For MLS and KB, the four gray-level pictures illustrate the labeled spatial frequency (SF) features associated with their overt perceptual judgments of "the nuns" and "Voltaire." The first- and second-order sensitivities of beta (for the nuns) and theta (for Voltaire) oscillations to these SF features are rendered in the two adjacent colored graphs. Labeled rows are those for which first- and second-order sensitivities reached significance (P < 0.01). The red (beta; for the nuns) and blue (theta; for Voltaire) plots reveal the average first- and second-order sensitivities across all individual SF features (for the first-order) and SF features combinations (for the second-order). The red (for the nuns) and blue (for Voltaire) strips indicate the perceptual moments at which oscillatory sensitivity to SF features is maximal.