Figure 2

The projection of the study data on the first 3 principal components [20] for the correlation matrix in Figure 1. Two views are offered—pairwise projections and a 3D view—showing the relative positions of healthy controls (light orange), ADHD patients (blue), Bipolar patients (red), and Schizophrenia patients (purple). Schizophrenia patients have extreme coefficient values on the first two principal component, and both BP and ADHD patients on the second and third. In the 3-dimensional perspective the separation of these four classes is more visible, with patients as outliers with high phenotypic variance. Very roughly, the three components respectively emphasize total raw scores in tasks, scores measuring psychological stress and mental health, and scores reflecting working memory performance.