- Psychopathology: People with a previous psychotic disorder (ICD 10, F20-F29 and F30.2, F31.2, F31.5, F32.3 and F33.3) or current psychiatric disorder (multiaxial axis 1) are not included. This is verified by diagnostic screening using K-SADS-PL at eligibility assessment before inclusion into the study of healthy controls. The presence of psychotic psychiatric diagnoses in first-degree relatives is also a cause for exclusion.