Fig. 1. (a) MEP_Pre symptom correlation matrix. The colour bar indicates the value of the Pearson correlation. In PANSS (14), P1–P7 are Symptoms 1–7, N1–N7 are Symptoms 8–14 and G1–G16 are Symptoms 15–30. The values for each score are 1–7. The symptoms are as follows: Delusions (P1), Conceptual disorganisation (P2), Hallucinations (P3), Hyperactivity (P4), Grandiosity (P5), Suspiciousness/persecution (P6), Hostility (P7), Blunted affect (N1), Emotional withdrawal (N2), Poor rapport (N3), Passive/apathetic social withdrawal (N4), Difficulty in abstract thinking (N5), Lack of spontaneity and flow of conversation (N6), Stereotyped thinking (N7), Somatic concern (G1), Anxiety (G2), Guilt feelings (G3), Tension (G4), Mannerisms and posturing (G5), Depression (G6), Motor retardation (G7), Uncooperativeness (G8), Unusual thought content (G9), Disorientation (G10), Poor attention (G11), Lack of judgment and insight (G12), Disturbance of volition (G13), Poor impulse control (G14), Preoccupation (G15) and Active social avoidance (G16). (b) MEP_Pre average symptom values in the three patient clusters detected by k-means. (c) MEP_Post average symptom values in the three patient clusters detected by k-means.