title: MMPI-2 restructured form over-reporting scales in first-episode psychosis.
abstract: MMPI-2-RF over-reporting scales for physical, cognitive, or psychological symptoms were examined in 130 consecutive referrals to a first-episode psychosis (FEP) clinic. Although acutely ill upon presentation, consistent and responsive profiles were obtained in 79% of the sample. There was no indication of under-reporting on defensive scales, and anticipated elevations were observed on clinical scales sensitive to thought disorder, ideas of persecution, and aberrant experiences. The Infrequent Somatic (Fs), Symptom Validity Scale (FBS-r), and Response Bias (RBS) scales did not indicate somatic or cognitive over-reporting, but the Infrequent Psychopathology Scale (Fp-r) showed a moderate elevation that may suggest a propensity for over-reporting or an effect of clinical symptoms on the over-reporting scale. Clinician ratings of positive symptoms of psychosis were related to the Fp-r. Although the over-reporting classifications with the RBS were relatively low, RBS scores were directly related to positive and general symptoms of psychosis. The MMPI-2-RF appears to have clinical value in an acutely ill FEP sample. The sample was not prone to over-reporting pathology, but associations between both the Fp-r and the RBS with clinical symptoms will warrant further investigation.
authors.affiliation: Alberta Hospital Edmonton Neuropsychology, Alberta, Canada. spurdon@ualberta.ca
authors.forename: Scot E
authors.initials: SE
authors.lastname: Purdon
authors.forename: Stacey M
authors.initials: SM
authors.lastname: Purser
authors.forename: Kim M
authors.initials: KM
authors.lastname: Goddard
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D016014:Linear Models; D008950:MMPI; D008297:Male; D008306:Malingering / Q000175:diagnosis* / Q000523:psychology; D001523:Mental Disorders / Q000150:complications* / Q000523:psychology*; D009483:Neuropsychological Tests; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results; D012189:Retrospective Studies; D055815:Young Adult