title: The Marijuana Screening Inventory (MSI-X): concurrent, convergent and discriminant validity with multiple measures.
abstract: This study evaluates the concurrent, convergent and discriminant validity between the MSI-X and five other instruments completed by 107 adults. Pearson correlation analysis with follow-up t-tests found concurrent validity between the MSI-X, Drug Abuse Screening Test (DAST-20), five Substance Abuse Subtle Screening Inventory (SASSI-3) subscales, a Diagnostic Statistical Manual (DSM) IV-TR Guided Marijuana Inventory, and two Addiction Severity Index variables. As evidence of MSI-X discriminant validity, no correlations were found with three alcohol measures. Convergent validity, determined by t-test associations between MSI-X total problems with SASSI-3 substance dependence scores, supported the MSI-X > or =6 scoring cutoff. Overall, the findings support MSI-X concurrent, convergent and discriminant validity.
authors.affiliation: Graduate College of Social Work, University of Houston, Houston, Texas 77204-4013, USA. dalealexander@sbcglobal.net
authors.forename: Dale
authors.initials: D
authors.lastname: Alexander
authors.forename: Patrick
authors.initials: P
authors.lastname: Leung
mesh_terms: D000293:Adolescent; D000328:Adult; D000437:Alcoholism / Q000175:diagnosis / Q000453:epidemiology; D016739:Behavior, Addictive / Q000175:diagnosis / Q000453:epidemiology; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000175:diagnosis* / Q000453:epidemiology*; D008403:Mass Screening / Q000379:methods*; D008875:Middle Aged; D015203:Reproducibility of Results; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000453:epidemiology; D011795:Surveys and Questionnaires