@article{928a4c5329ba435789b160bbb7598b1e,
title = "Using multidimensional modeling to combine self-report symptoms with clinical judgment of schizotypy",
abstract = "This study investigated psychometric properties of two widely used instruments to measure subclinical levels of psychosis, the Community Assessment of Psychic Experiences (CAPE) and the Structured Interview for Schizotypy-Revised (SIS-R), and aimed to enhance measurements through the use of multidimensional measurement models. Data were collected in 747 siblings of schizophrenia patients and 341 healthy controls. Multidimensional Item-Response Theory, Mokken Scale and ordinal factor analyses were performed. Both instruments showed good psychometric properties and were measurement invariant across siblings and controls. The latent traits measured by the instruments show a correlation of 0.62 in siblings and 0.47 in controls. Multidimensional modeling resulted in smaller standard errors for SIS-R scores. By exploiting correlations among related traits through multidimensional models, scores from one diagnostic instrument can be estimated more reliably by making use of information from instruments that measure related traits.",
keywords = "Assessment, Item Response Theory (IRT), Liability, Measurement invariance",
author = "{van den Berg}, {St{\'e}phanie M.} and Paap, {Muirne C.S.} and Derks, {Eske M.} and Kahn, {Ren{\'e} S.} and Linszen, {Don H.} and Jim Vanos and Durk Wiersma and Richard Bruggeman and Wiepke Cahn and Lieuwede Haan and Lydia Krabbendam and Inez Myin-Germeys",
note = "Funding Information: This work was supported by the Geestkracht programme of the Dutch Health Research Council (ZON-MW, Grant no. 10-000-1002 ); the EU Seventh Framework Programme (consortium name: EU-GEI) and matching funds from the Participating universities and mental health care organizations (Site Amsterdam: Academic Psychiatric Centre AMC, Ingeest, Arkin, Dijk en Duin, Rivierduinen, ErasmusMC, GGZ Noord Holland Noord; Site Utrecht: University Medical Centre Utrecht, Altrecht, Symfora, Meerkanten, Riagg Amersfoort, Delta; Site Groningen: University Medical Center Groningen, Lentis, GGZ Friesland, GGZ Drenthe, Adhesie, Mediant, GGZ De Grote Rivieren and Parnassia psycho-medical centre; Site Maastricht: Maastricht University Medical Center, GGZ Eindhoven, GGZ Midden-Brabant, GGZ Oost-Brabant, GGZ Noord-Midden Limburg, MondriaanZorggroep, Prins Claus-centrum Sittard, RIAGG Roermond, Universitair Centrum Sint-JozefKortenberg, CAPRI University of Antwerp, PC ZiekerenSint-Truiden, PZ Sancta Maria Sint-Truiden, GGZ Overpelt, OPZ Rekem). Eske Derks is financially supported by the Netherlands Scientific Organization (Nederlandse Organisatie voor Wetenschappelijk Onderzoek, gebied Maatschappij-en Gedragswetenschappen: NWO/MaGW , Grant no. VENI-451-080-010 ). We are grateful for the generosity of time and effort by the patients and their families, healthy subjects, and all researchers who make this GROUP project possible.",
year = "2013",
month = mar,
day = "30",
doi = "10.1016/j.psychres.2012.09.015",
language = "English",
volume = "206",
pages = "75--80",
journal = "Psychiatry Research",
issn = "0165-1781",
publisher = "Elsevier Ireland Ltd",
number = "1",
}