Top: two-component GMM fit to the P1 sample with contours showing weighted log probabilities of the combined model. Contour levels are from 2.5 to 8.5 with a spacing of 1 in log probability. The red crosses mark the component means. Bottom: distribution of ΔBIC over 10,000 bootstrap trials when varying the number of components. Blue: ﹩1\to 2﹩, orange: ﹩2\to 3﹩, and green: ﹩3\to 4﹩.