title: Validation of the Portuguese version of the Psychotic Symptom Rating Scales (PSYRATS).
abstract: The Psychotic Symptom Rating Scales (PSYRATS) is a clinical assessment tool that focuses on the detailed measurement of delusions and hallucinations in patients with psychosis. The goal of this study was to examine the psychometric properties of the Portuguese version of the PSYRATS. A sample of 92 outpatients suffering from schizophrenia or schizoaffective disorders and presenting persistent psychotic symptoms was assessed using the PSYRATS and the Positive and Negative Syndrome Scale (PANSS). Good inter-rater reliability, test-retest reliability, concurrent validity and internal consistency were found. Factor analysis of the auditory hallucinations scale items disclosed a four-factor solution: emotion characteristics and disruption factor (factor 1), a physical characteristics factor (factor 2), a control characteristics factor (factor 3) and a cognitive attribution factor (factor 4). Regarding the delusions scale items, a two-factor solution was found: cognitive interpretation and disruption factor (factor 1) and an emotional characteristics (factor 2). The Portuguese version of the PSYRATS partially replicates previously published results in other countries.
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal Santa Maria Hospital, Department of Psychiatry, Lisboa, Portugal.
authors.forename: Diogo
authors.initials: D
authors.lastname: Telles-Correia
authors.affiliation: Polytechnic Institute of Porto, Health School, Porto, Portugal.
authors.forename: Nuno
authors.initials: N
authors.lastname: Barbosa-Rocha
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal Schizophrenia Clinic, Hospital Júlio de Matos, Lisbon Psychiatric Hospital Center, Portugal.
authors.forename: João
authors.initials: J
authors.lastname: Gama-Marques
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal.
authors.forename: Ana L
authors.initials: AL
authors.lastname: Moreira
authors.affiliation: Schizophrenia Clinic, Hospital Júlio de Matos, Lisbon Psychiatric Hospital Center, Portuga.
authors.forename: Cátia
authors.initials: C
authors.lastname: Alves-Moreira
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal Schizophrenia Clinic, Hospital Júlio de Matos, Lisbon Psychiatric Hospital Center, Portugal.
authors.forename: Sérgio
authors.initials: S
authors.lastname: Saraiva
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal Santa Maria Hospital, Department of Psychiatry, Lisboa, Portugal.
authors.forename: Filipa
authors.initials: F
authors.lastname: Antunes
authors.affiliation: University Clinic of Psychiatry and Medical Psychology, Faculty of Medicine, University of Lisbon, Lisboa, Portugal Santa Maria Hospital, Department of Psychiatry, Lisboa, Portugal.
authors.forename: Carolina
authors.initials: C
authors.lastname: Almeida
authors.affiliation: Institute of Psichiatry, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.
authors.forename: Sérgio
authors.initials: S
authors.lastname: Machado
authors.affiliation: Section for Clinical and Health Psychology, School of Psychological Sciences, University of Manchester, Manchester, United Kingdom.
authors.forename: Gillian
authors.initials: G
authors.lastname: Haddock
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D011618:Psychotic Disorders / Q000175:diagnosis*; D014177:Translations