title: Validation of the dimensions of psychosis instrument in Mexican patients with schizophrenia spectrum disorders.
abstract: The objective was to determine the psychometric properties of the Dimensions of Psychosis Instrument (DIPI) in Mexican patients with schizophrenia spectrum disorders. One-hundred patients were recruited. Convergent and divergent validity were determined with the positive and negative scores of the Positive and Negative Syndrome Scale; a forced five-factor exploratory principal-components analysis with varimax rotation was developed. Total DIPI score shows an adequate convergent validity. The rotated principal component matrix accounted for 82.1% of the variance. Our study gives further support of the adequacy of the DIPI for the assessment of the five most common subjective experiences related to psychosis.
authors.affiliation: Experimental Psychiatry Laboratory, Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico.
authors.forename: Pablo
authors.initials: P
authors.lastname: León-Ortiz
authors.forename: Ana
authors.initials: A
authors.lastname: Fresán
authors.forename: Sylvana
authors.initials: S
authors.lastname: Stephano
authors.forename: Camilo
authors.initials: C
authors.lastname: de la Fuente-Sandoval
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D009483:Neuropsychological Tests; D025341:Principal Component Analysis; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics / Q000379:methods*; D011618:Psychotic Disorders / Q000175:diagnosis* / Q000209:etiology*; D015203:Reproducibility of Results; D012559:Schizophrenia / Q000150:complications*; D018709:Statistics, Nonparametric; D055815:Young Adult