Development and psychometric evaluation of the gambling treatment outcome monitoring system (GAMTOMS).
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.
Stinchfield
Randy
R
Department of Psychiatry, University of Minnesota Medical School, MN 55105, USA. randy@lenti.med.umn.edu
Winters
Ken C
KC
Botzet
Andria
A
Jerstad
Sarah
S
Breyer
Jessie
J
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