title: Spanish adaptation of the Green Paranoid Thought Scales.
abstract: BACKGROUND
  The aim of this study was to adapt and obtain validity evidence of the Spanish Green Paranoid Thought Scales (S-GPTS).
  
  
  METHODS
  191 Spanish people responded to S-GPTS, Peters Delusions Inventory (PDI), and measures of psychopathology.
  
  
  RESULTS
  Principal Component Analyses on the polychoric correlation matrix identified two factors accounting for 71.0% of the cumulative variance. Cronbach alphas for S-GPTS total and its subscales were above .90 in clinical and non-clinical group. The value of the area under the receiver operating characteristic curve was higher for the S-GPTS (.898), than for the PDI (.859). The best S-GPTS threshold to discriminate between cases and non-cases was 92 (sensitivity, 97.35%; specificity, 65%). S-GPTS scores positively correlated with PDI and measures of anxiety and depression.
  
  
  CONCLUSIONS
  The S-GPTS has adequate psychometric properties to provide valid measures of delusional ideation in a Spanish population.
authors: CIBERSAM, University of Granada.
authors: Inmaculada
authors: I
authors: Ibáñez-Casas
authors: Pedro
authors: P
authors: Femia-Marzo
authors: José-Luis
authors: JL
authors: Padilla
authors: Catherine E L
authors: CE
authors: Green
authors: Enrique
authors: E
authors: de Portugal
authors: Jorge A
authors: JA
authors: Cervilla
mesh_terms: D000328:Adult; D000368:Aged; D001007:Anxiety / Q000523:psychology; D002648:Child; D003702:Delusions / Q000523:psychology; D003863:Depression / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010259:Paranoid Disorders / Q000523:psychology*; D025341:Principal Component Analysis; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D012944:Social Support; D013030:Spain; D014175:Translating; D055815:Young Adult