1. Lentis Research Groningen The Netherlands
2. Department of PsychologyBar‐Ilan University Ramat‐Gan Israel
3. Parnassia Dijk en Duin The Netherlands
4. Psychometrics and StatisticsUniversity of Groningen Groningen The Netherlands
5. Psychosis ResearchParnassia Psychiatric Institute The Netherlands
6. Department of Clinical Psychology and Amsterdam Public Health ResearchVU University Amsterdam The Netherlands
7. Department of NeuroscienceUniversity of Groningen, University Medical Center Groningen Groningen The Netherlands
8. Department of Clinical Psychology and Experimental PsychopathologyUniversity of Groningen Groningen The Netherlands
9. Department of Psychotic DisordersGGZ Noord‐Drenthe Assen The Netherlands
10. Department of PsychiatryRoudeboush VA Medical Center Indianapolis IN USA
11. Department of PsychiatryIndiana University School of Medicine Indianapolis IN USA