Fig. 2: Item stability of the 30 items of the PANSS.

P1, Delusions; P2, Conceptual Disorganisation; P3, Hallucinatory Behaviour; P4, Excitement; P5, Grandiosity; P6, Suspiciousness/Persecution; P7, Hostility; N1, Blunted Affect; N2, Emotional Withdrawal; N3, Poor Rapport; N4, Passive/Apathetic Social Withdrawal; N5, Difficulty in Abstract Thinking; N6, Lack of Spontaneity and Flow of Conversation; N7, Stereotyped Thinking; G1, Somatic Concern; G2, Anxiety; G3, Guilt Feelings; G4, Tension; G5, Mannerisms and Posturing; G6, Depression; G7, Motor Retardation; G8, Uncooperativeness; G9, Unusual Thought Content; G10, Disorientation; G11, Poor Attention; G12, Lack of Judgment and Insight; G13, Disturbance of Volition; G14, Poor Impulse Control; G15, Preoccupation; G16, Active Social Avoidance.