Assessing the Validity and Reliability of the Farsi Version of Inventory Drug-Taking Situations


Objective: Inventory Drug-Taking Situations (IDTS) is a universal instrument used to determine high-risk situations resulting in drug abuse. The aim of this study was to translate this questionnaire to Farsi, and to assess its validity and reliability by applying it to Iranian drug users.
As a psychometric study, 300 drug users participated in a treatment program in National Center of Addiction Studies filled in a version of Inventory of Drug Taking Situations. We assessed face and content validity, internal consistency, and reliability based on the completed questionnaires, using test-retest method and confirmatory factor analysis.
Results: Internal consistency analysis confirmed that all subscales of IDTS were reliable (Cronbach alpha was ranging from 0.7 to 0.81). Analyses indicated that each of the subscales was unifactorial; however, unpleasant emotions had a second eigenvalue that was nearly large enough to be a second factor. Confirmatory factor analysis was used to test the fit of the data to the original version of IDTS. Based on goodness of fit indices, we found that all factors were fitted (χ2/df=1.43, GFI=0.98, RMSEA=0.038). The test-retest reliability was satisfactory(r>0.6).
Conclusion: The Farsi version of Inventory of Drug Taking Situations was shown to be a valid and reliable instrument to apply in clinical and research settings in Iran.

Annis HM, Turner NE, Sklar SM. Inventory of Drug-Taking Situations. Centre for Addiction & Mental Health; 1997.

Annis H, Martin G. Inventory of drug-taking situations. Toronto: Addiction Research Foundation; 1985.

Turner NE, Annis HM, Sklar SM. Measurement of Antecedents to Drug and Alcohol Use: Psychometric Properties of the Inventory of Drug-Taking Situations (Idts). Behaviour research and therapy 1997; 35: 465-483.

Marlatt GA, Gordon JR. Determinants of relapse: Implications for the maintenance of behavior change.

Marlatt GA, Gordon JR. Relapse Prevention: Maintenance Strategies in the treatment of addictive behaviors. New York: Guilford; 1985.

Waldrop AE, Back SE, Brady KT, Upadhyaya HP, McRae AL, Saladin ME. Daily Stressor Sensitivity, Abuse Effects, and Cocaine Use in Cocaine Dependence. Addictive behaviors 2007; 32: 3015-3025.

Starks TJ, Golub SA, Kelly BC, Parsons JT. The Problem of "Just for Fun": Patterns of Use Situations among Active Club Drug Users. Addictive behaviors 2010; 35: 1067-1073.

Momtazi S, Rawson R. Substance Abuse among Iranian High School Students. Current opinion in psychiatry 2010; 23: 221-226.

Nunnally JC. Psychometric Theory, 3eds. New York: McGraw-Hill; 1978.

McDowell I. Measuring health: a guide to rating scales and questionnaires 3eds. USA: Oxford University Press; 2006.

Schmitt NW. Uses and abuses of coefficient alpha paper presented at the 1995 Convention of the American Psychological Association. 1995.

Patil VH, Singh SN, Mishra S, Donovan T. Parallel Analysis Engine to Aid Determining Number of Factors to Retain (Computer software); 2007.

Marlatt GA. Craving for alcohol, loss of control and relapse: A cognitive –behavioral analysis. In: Nathan PE, Marlatt GA, Loberg T. New directions in behavioral research and treatment. New York: Plenum; 1978.

Marlatt GA. Alcohol use and problem drinking: A cognitive-behavioral analysis. theory. In: Kendall PC, Hollon SD. Cognitive behavioral interventions: theory research and procedures New York: Academic press; 1979.

Victorio A. The Relation between Intake Patterns and Substance Abuse in a Student Sample. Addictive behaviors 2001; 26: 439-445.

Hui CH, T.H., Measurement in cross-cultural psychology: A review and comparison of strategies. Journal of Cross-Cultural Psychology 1985; 16: 131-152.

IssueVol 8 No 2 (2013) QRcode
Inventory of Drug Taking Situations (IDTS) Iran reliability validity

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
Pashaei T, Razaghi OM, Foroushani AR, Tabatabaei MG, Moeeni M, Turner NE, Sharifi V, Shojaeizadeh D. Assessing the Validity and Reliability of the Farsi Version of Inventory Drug-Taking Situations. Iran J Psychiatry. 8(2):80-5.