title: On the measurement of delusions.
abstract: Garety (1985) analysed problems with existing definitions of delusions, focusing on the fixity and intensity of delusional beliefs. A quantitative method was proposed to evaluate with greater sensitivity the intensity of delusional conviction and its fixity over time. In this comment, three related points are raised about Garety's analysis and measure. None of the three challenges the fundamental usefulness or value of the measure, although potential problems are noted in the items used to check test-retest reliability and in the wording of one of the two forms described.
authors.affiliation: Department of Psychiatry, State University of New York, Brooklyn 11203-2098.
authors.forename: J
authors.initials: J
authors.lastname: Walkup
mesh_terms: D001364:Awareness; D003702:Delusions / Q000175:diagnosis* / Q000523:psychology; D006801:Humans; D010556:Personality Tests; D011936:Reality Testing