Figure 6.

A–C, Cross-cultural validation. Twenty-seven odorous molecules not commonly used in olfactory studies, and not previously tested by us were presented to three cultural groups of naive subjects: Americans (23 subjects), Arab-Israelis (22 subjects), and Jewish-Israelis (20 subjects). In all cases, our predictions of odorant pleasantness were in fact better than in the test data (Fig. 4B). D–F, Ratings of edibility for the same odorants and groups. Across all cultures, our predicted PC1 values were significantly better correlated with judgments of pleasantness than judgments of edibility.