title: Development of a computerized adaptive test for Schizotypy assessment.
abstract: BACKGROUND
  Schizotypal traits in adolescents from the general population represent the behavioral expression of liability for psychotic disorders. Schizotypy assessment in this sector of population has advanced considerably in the last few years; however, it is necessary to incorporate recent advances in psychological and educational measurement.
  
  
  OBJECTIVE
  The main goal of this study was to develop a Computerized Adaptive Test (CAT) to evaluate schizotypy through "The Oviedo Questionnaire for Schizotypy Assessment" (ESQUIZO-Q), in non-clinical adolescents.
  
  
  METHODS
  The final sample consisted of 3,056 participants, 1,469 males, with a mean age of 15.9 years (SD=1.2).
  
  
  RESULTS
  The results indicated that the ESQUIZO-Q scores presented adequate psychometric properties under both Classical Test Theory and Item Response Theory. The Information Function estimated using the Gradual Response Model indicated that the item pool effectively assesses schizotypy at the high end of the latent trait. The correlation between the CAT total scores and the paper-and-pencil test was 0.92. The mean number of presented items in the CAT with the standard error fixed at ≤ 0.30 was of 34 items.
  
  
  CONCLUSIONS
  The CAT showed adequate psychometric properties for schizotypy assessment in the general adolescent population. The ESQUIZO-Q adaptive version could be used as a screening method for the detection of adolescents at risk for psychosis in both educational and mental health settings.
authors.affiliation: Department of Educational Sciences, University of La Rioja, La Rioja, Spain ; Center for Biomedical Research in the Mental Health Network (CIBERSAM), Madrid, Spain.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Fonseca-Pedrero
authors.forename: Luis Fernando
authors.initials: LF
authors.lastname: Menéndez
authors.forename: Mercedes
authors.initials: M
authors.lastname: Paino
authors.forename: Serafín
authors.initials: S
authors.lastname: Lemos-Giráldez
authors.forename: José
authors.initials: J
authors.lastname: Muñiz
mesh_terms: D000293:Adolescent; D003936:Diagnosis, Computer-Assisted; D005260:Female; D006801:Humans; D008297:Male; D011594:Psychometrics; D012569:Schizotypal Personality Disorder / Q000175:diagnosis*
references.citation: Psychol Med. 2013 Jun;43(6):1133-49
references.pmid: 22850401
references.citation: Psychol Med. 2012 Nov;42(11):2239-53
references.pmid: 22260930
references.citation: Arch Gen Psychiatry. 2000 Nov;57(11):1053-8
references.pmid: 11074871
references.citation: Psychiatry Res. 2013 May 30;207(3):189-94
references.pmid: 23122557
references.citation: Psychol Assess. 2007 Mar;19(1):14-24
references.pmid: 17371120
references.citation: Schizophr Bull. 2011 Mar;37(2):362-9
references.pmid: 19542527
references.citation: Psychiatry Res. 2011 Jun 30;188(1):147-55
references.pmid: 21208660
references.citation: Psychol Med. 2009 Apr;39(4):625-34
references.pmid: 18606046
references.citation: J Pain. 2009 Sep;10(9):932-43
references.pmid: 19595636
references.citation: J Abnorm Psychol. 2005 Feb;114(1):170-5
references.pmid: 15709824
references.citation: Psicothema. 2011 Feb;23(1):87-93
references.pmid: 21266147
references.citation: Int Rev Psychiatry. 2007 Dec;19(6):633-46
references.pmid: 18092241
references.citation: Schizophr Bull. 1994;20(1):121-35
references.pmid: 8197410
references.citation: Psychol Bull. 2011 Sep;137(5):856-79
references.pmid: 21574681
references.citation: Med Clin (Barc). 2009 Jul 18;133(7):241-51
references.pmid: 19560172
references.citation: Psychol Med. 2009 Feb;39(2):179-95
references.pmid: 18606047
references.citation: Psychiatry Res. 2011 Dec 30;190(2-3):309-15
references.pmid: 21663975
references.citation: Arch Gen Psychiatry. 2012 May;69(5):467-75
references.pmid: 22213772
references.citation: World Psychiatry. 2008 Oct;7(3):148-56
references.pmid: 18836582
references.citation: Schizophr Res. 2002 Mar 1;54(1-2):17-23
references.pmid: 11853974
references.citation: Qual Life Res. 2007;16 Suppl 1:5-18
references.pmid: 17375372
references.citation: Psicothema. 2013;25(2):171-8
references.pmid: 23628530
references.citation: Schizophr Bull. 2008 May;34(3):444-57
references.pmid: 17768308
references.citation: Annu Rev Clin Psychol. 2006;2:291-326
references.pmid: 17716072
references.citation: Schizophr Res. 2009 Jun;111(1-3):53-60
references.pmid: 19342199
references.citation: Psicothema. 2010 May;22(2):340-7
references.pmid: 20423641
references.citation: Schizophr Bull. 1991;17(4):555-64
references.pmid: 1805349
references.citation: Health Qual Life Outcomes. 2010 Dec 03;8:147
references.pmid: 21129169
references.citation: Schizophr Bull. 2011 Jan;37(1):84-93
references.pmid: 19460881
references.citation: Psychol Med. 2011 Jan;41(1):1-6
references.pmid: 20624328