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  • Helga K. Ising, Wim Veling, +8 authors Mark van der Gaag
  • Psychology, Medicine
  • Schizophrenia bulletin
  • 1 November 2012
  • In order to bring about implementation of routine screening for psychosis risk, a brief version of the Prodromal Questionnaire (PQ; Loewy et al., 2005) was developed and tested in a generalContinue Reading
  • Judith Rietdijk, Marjolein Fokkema, +10 authors Mark Van Der Gaag
  • Psychology, Medicine
  • Social Psychiatry and Psychiatric Epidemiology
  • 1 March 2014
  • PurposeFactor mixture analysis (FMA) and item response mixture models in the general population have shown that the psychosis phenotype has four classes. This study attempted to replicate thisContinue Reading