1. Department of Experimental Psychopathology, University of Groningen , Groningen , The Netherlands
2. Department of Forensic Psychiatry, GGZ Friesland , Leeuwarden , The Netherlands
3. Department of Psychology, Harvard University , Cambridge, MA , USA
4. Department of Psychometrics and Statistics, University of Groningen , Groningen , The Netherlands
5. Department of Psychotic Disorders, GGZ Drenthe , Assen , The Netherlands