2.2.1. Diagnostics and positive symptoms
The Mini International Neuropsychiatric Interview (MINI-Plus;
Sheehan et al., 1998; Van Vliet et al., 2000) section M for psychotic
disorders was used as a check for the presence of a psychotic
disorder in the patients. The MINI-Plus is a short structural diagnostic
interview, consisting of 26 modules assessing Axis-I disorders
according to the DSM criteria.