title: Development and initial validation of a scale for detecting inconsistent responding on the personality assessment inventory-short form.
abstract: The goal of this investigation was the development of an inconsistency scale (ICN-SF) for the personality assessment inventory-short form (PAI-SF). In Study 1, 503 inpatient profiles were randomly assigned to a derivation or cross-validation sample. Ten correlated item pairs were identified using the derivation sample and placed on the ICN-SF. Psychometric properties of the ICN-SF total scores were comparable in the derivation and cross-validation samples. Total ICN-SF scores in both samples were significantly lower than scores obtained from computer-generated random samples. Diagnostic efficiency statistics are reported using multiple cut-off scores at various base rate estimates. ICN-SF scores greater than 8 reasonably balanced sensitivity and specificity rates. This cutoff correctly classified 92% of the random protocols and inaccurately classified 9% of the patient protocols in study 1. In study 2, PAI-SF scores from 627 forensic and civil inpatients produced similar results, effectively identifying cases with elevated scores on the full-form inconsistency scale. Overall the results of both studies suggest that the ICN-SF can aid examiners in assessing for inconsistent responding.
authors.affiliation: Department of Behavioral Sciences, University of Michigan-Dearborn, MI 48128, USA. csiefert@umd.umich.edu
authors.forename: Caleb J
authors.initials: CJ
authors.lastname: Siefert
authors.forename: Michelle
authors.initials: M
authors.lastname: Stein
authors.forename: Samuel Justin
authors.initials: SJ
authors.lastname: Sinclair
authors.forename: Daniel
authors.initials: D
authors.lastname: Antonius
authors.forename: Andrew
authors.initials: A
authors.lastname: Shiva
authors.forename: Mark A
authors.initials: MA
authors.lastname: Blais
mesh_terms: D000328:Adult; D001288:Attention; D001714:Bipolar Disorder / Q000175:diagnosis / Q000523:psychology / Q000628:therapy; D003134:Commitment of Persons with Psychiatric Disorders; D008192:Deception; D003866:Depressive Disorder / Q000175:diagnosis / Q000523:psychology / Q000628:therapy; D001068:Feeding and Eating Disorders / Q000175:diagnosis / Q000523:psychology / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis* / Q000523:psychology / Q000628:therapy; D008875:Middle Aged; D010552:Personality Assessment / Q000706:statistics & numerical data*; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011329:Prisoners / Q000523:psychology; D011567:Psychiatric Department, Hospital; D011594:Psychometrics / Q000706:statistics & numerical data; D011599:Psychopathology; D011613:Psychotherapy; D015203:Reproducibility of Results; D012559:Schizophrenia / Q000175:diagnosis / Q000628:therapy; D012565:Schizophrenic Psychology; D013223:Statistics as Topic; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000523:psychology / Q000628:therapy