title: The validity of the assessment of psychopathology in the psychoses.
abstract: This paper reviews recent progress in the assessment of the psychopathology of psychosis and focuses upon a number of persistent limitations. In particular the over-emphasis upon reliability at the expense of validity is highlighted and the relationship between reliability and validity is reconsidered. A number of strategies aimed at improving the validity of psychopathological measures are outlined. Proposals to deploy such variables differently in research strategies and analyses are endorsed.
authors.affiliation: NH & MRC Schizophrenia Research Unit, Royal Park Hospital, Parkville, Victoria, Australia.
authors.forename: P D
authors.initials: PD
authors.lastname: McGorry
authors.forename: D L
authors.initials: DL
authors.lastname: Copolov
authors.forename: B S
authors.initials: BS
authors.lastname: Singh
mesh_terms: D006801:Humans; D007406:Interview, Psychological; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D011618:Psychotic Disorders / Q000175:diagnosis*