Fig. 2.

Interactions of 5-HTTLPR genotype and BDW on intergroup bias. Higher BDW was more predictive of intergroup bias among the S-group compared with the L/L-group. This gene x environment interaction was selectively observed only for attitudes toward the two groups rated to be the most threatening (Arabs and people with schizophrenia). BDW (x-axis) is represented in Z-score values. Dots reflect participant scatter plot data. Lines reflect simple slopes for the interactions at low (−1 s.d.) and high (+1 s.d.) levels of BDW.