title: Reliability and normative data of the Perceptual Aberration Scale in an Italian juvenile general population sample.
abstract: Psychometric tools, such as the Perceptual Aberration Scale (PAS), have been developed to identify people at risk to develop psychosis. This paper aims at providing an Italian version of the Perceptual Aberration Scale and its normative data for the general juvenile Italian population. The Italian version of the PAS was produced using three independent translators. It was administered to 1089 non-clinical participants, stratified into three age-groups, i.e., 8-13, 14-17 and 18-24. The Italian version of the PAS displayed good internal consistency in each age-group evaluated (i.e. Alpha Coefficients: 0.90 for the 8-13 age-group, 0.84 for the 14-17 age-group, and 0.87 for the 18-24 age-group) and the assumption of unidimensionality was corraborate. Furthermore, normative data for the three groups were collected (i.e. cut-offs: 25 for the 8-13 age-group, 21 for the 14-17 age-group and 20 for the 18-24 age-group) and an age-related difference, as the 18-24 group scored lower than the younger groups, was found. The Italian version of the PAS proved to be a reliable psychometric tool to investigate perceptual aberration during childhood, adolescence and young adulthood.
authors.affiliation: Scientific Institute IRCCS "Eugenio Medea", Italy.
authors.forename: Livia
authors.initials: L
authors.lastname: Fornasari
authors.affiliation: Mental Health Unit, National Centre of Epidemiology, Surveillance and Health Promotion, Italian National Institute of Health, Rome, Italy.
authors.forename: Angelo
authors.initials: A
authors.lastname: Picardi
authors.affiliation: Scientific Institute IRCCS "Eugenio Medea", Italy; Department of Human Sciences (DISU), University of Udine, Udine, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Garzitto
authors.affiliation: Mental Health Unit, National Centre of Epidemiology, Surveillance and Health Promotion, Italian National Institute of Health, Rome, Italy.
authors.forename: Antonella
authors.initials: A
authors.lastname: Gigantesco
authors.affiliation: Department of Mental Health, Alessandria, Italy.
authors.forename: Michela
authors.initials: M
authors.lastname: Sala
authors.affiliation: Department of Human Sciences (DISU), University of Udine, Udine, Italy.
authors.forename: Manola
authors.initials: M
authors.lastname: Romanò
authors.affiliation: Scientific Institute IRCCS "Eugenio Medea", Italy; Department of Human Sciences (DISU), University of Udine, Udine, Italy.
authors.forename: Franco
authors.initials: F
authors.lastname: Fabbro
authors.affiliation: Department of Neurosciences and Mental Health, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy; Department of Psychiatry and Behavioral Sciences, University of Texas Health Science Center at Houston, TX, USA. Electronic address: paolo.brambilla1@unimi.it.
authors.forename: Paolo
authors.initials: P
authors.lastname: Brambilla
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D007558:Italy / Q000453:epidemiology; D007802:Language; D008297:Male; D011159:Population Surveillance; D011594:Psychometrics / Q000379:methods / Q000592:standards; D011618:Psychotic Disorders / Q000175:diagnosis* / Q000453:epidemiology* / Q000523:psychology; D015203:Reproducibility of Results; D013223:Statistics as Topic / Q000379:methods / Q000592:standards*; D011795:Surveys and Questionnaires / Q000592:standards*; D055815:Young Adult
keywords: Assessment; Prevention; Psychosis; Reliability; Validity