title: Development and psychometric evaluation of the gambling treatment outcome monitoring system (GAMTOMS).
abstract: This article describes the development and initial reliability and validity estimates of the Gambling Treatment Outcome Monitoring System (GAMTOMS), a multi-instrument and multidimensional outcome assessment battery designed to measure gambling treatment outcomes. Reliability methods included both internal consistency of scales and a 1-week test-retest temporal stability procedure. Validity was examined with procedures to estimate content, convergent, discriminant, predictive, and construct validity. Data were collected from 2 separate studies, 1 on the questionnaire version and 1 on the interview version. The questionnaire study included 46 female and 41 male gambling treatment clients and 22 female and 2 male nonclinical participants. The interview study included 88 female and 62 male gambling treatment clients and 16 female and 9 male nonclinical participants. The GAMTOMS was found to yield satisfactory estimates of internal consistency, and 1-week test-retest reliability and was also found to demonstrate satisfactory content, convergent, discriminant, predictive, and construct validity.
authors.affiliation: Department of Psychiatry, University of Minnesota Medical School, MN 55105, USA. randy@lenti.med.umn.edu
authors.forename: Randy
authors.initials: R
authors.lastname: Stinchfield
authors.forename: Ken C
authors.initials: KC
authors.lastname: Winters
authors.forename: Andria
authors.initials: A
authors.lastname: Botzet
authors.forename: Sarah
authors.initials: S
authors.lastname: Jerstad
authors.forename: Jessie
authors.initials: J
authors.lastname: Breyer
mesh_terms: D000328:Adult; D016739:Behavior, Addictive / Q000523:psychology* / Q000628:therapy*; D016002:Discriminant Analysis; D005260:Female; D005715:Gambling; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D016896:Treatment Outcome