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Instruments

This section contains the measures related to gambling and substance abuse that have been developed by Dr. David Hodgins and his research team. All measures listed on this website are available for download and use for research purposes, provided that appropriate citation is referenced. Most files are in pdf format and you will need Acrobat Reader to view them.

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Gambling Abstinence Self Efficacy Scale (GASS)

The GASS is a 21-item measure assessing self-efficacy to abstain from gambling across various high-risk situations. The attached manuscript provides a description of scale development, reliability, and validity.

The manuscript appears in International Gambling Studies and the reference is:

Hodgins, D., Peden, N., & Makarchuk, K. (2004). Self-efficacy in pathological gambling treatment outcome: Development of a gambling abstinence self-efficacy scale (GASS). International Gambling Studies, 4(2), 99-108.

Download the GASS

Download the GASS Scoring Key

Download the GASS Manuscript

*Please note, the weightings in Table 1 of the manuscript are not accurate.
Please refer to the updated GASS scoring key if you wish to score the scale.


Gambling Cognition Inventory (GCI)

The GCI is a 33-item measure assessing cognitive distortions associated with pathological gambling. The attached manuscript provides a description of scale development, reliability, and validity.

The manuscript appears in International Gambling Studies and the reference is:

McInnes, A., Hodgins, D. C., & Holub, A. (2014). The Gambling Cognitions Inventory: Scale development and psychometric validation with problem and pathological gamblers. International Gambling Studies, 14(3), 410-431. doi: 10.1080/14459795.2014.923483

Download the GCI 

Download the GCI Scoring Key


Game Addiction Inventory for Adults (GAIA)

The GAIA is a 31-item measure assessing both video game addiction and engagement. The attached manuscript provides a description of scale development, reliability, and validity.

The manuscript appears in Addiction Research & Theory and the reference is:

Wong, U., Hodgins, D.C. (2013) Development of the game addiction inventory for adults (GAIA). Addiction Research & Theory, Early Online, pp. 1-15. doi: 10.3109/16066359.2013.824565

Download the GAIA questionnaire

Download the GAIA Scoring Key

Download GAIA manuscript


Processes of Change Questionnaire (PoC)

The PoC is a self-report scale based on the transtheoretical model of change (DiClemente & Prochaska, 1998) that was originally developed to measure change during smoking cessation. It has been adapted to measure change in problem gambling. The scale classifies respondents into five developmental stages: precontemplation, contemplation, determination, action, and maintenance. Ten different processes of change are used to progress through the stages and can be classified into two groups- the cognitive experiential and behavioural processes clusters. Explanations of the processes of change can be found in the manuscript.

The manuscript appears in Addictive Behaviors and the reference is:

Hodgins, D.C. (2001) Processes of changing gambling behavior. Addictive Behaviors, 26, pp. 121-128.

Download the PoC Gambling Questionnaire

Download the PoC Gambling Scoring Key


Readiness to Change Questionnaire (Clinician rated)

The readiness to change questionnaire--clinician version (RCQ-CV) provides a measure of stage of change based upon the transtheoretical model of change (Prochaska, DiClemente, and Norcross, 1992). Separate versions are provided for both alcohol problems and drug problems. The attached manuscript provides a description of the development of the RCQ-CV, validity and reliability.

The manuscript appears in the journal Substance Abuse and the reference is:

Hodgins, David, C. (2001). Stages of change assessments in alcohol problems: Agreement across self and clinician reports. Substance Abuse, 22(2), pp. 87-96.

Download RCQ-CV for Alcohol Problems

Download the RCQ-CV for Drug Problems

Download the RCQ-CV Manuscript


Sheehan Disability Scale for Gambling (SDS-G)

The SDS-G is a brief, psychometrically sound, outcome measure of impairment associated with gambling disorders that can be administered by telephone.

The manuscript appears in the journal BMC psychiatry and the reference is:

Hodgins, David C. (2013). Reliability and validity of the Sheehan disability scale modified for pathological gambling. BMC psychiatry, 13(1), 177.

Download SDS-G

Download the SDS-G Manuscript


Temptations for Gambling Questionnaire (TGQ)

The TGQ is a 21-item measure assessing temptation to gamble across various high-risk situations. The attached manuscript provides a description of scale development, reliability, and validity.

The manuscript appears in the journal Addiction Research & Theory and the reference is:

Holub, A., Hodgins, D. C., & Peden, N. E. (2005). Development of the temptations for gambling questionnaire: A measure of temptation in recently quit gamblers. Addiction Research & Theory, 13(2), 179-191.

Download the TGQ

Download the GASS and TGQ Scoring Grid


Timeline FollowBack for Gambling (TLFB)

Timeline Followback (TLFB; Sobell and Sobell, 1996) is a method of retrospectively assessing gambling behaviour over a specified period of time. The method was originally developed to assess alcohol use retrospectively but has been applied to other addictive behaviour including drugs and gambling. The procedure involves using calendars and memory aids to determine specific days and amounts of money gambled over a specified time period. TLFB can be done both in-person and over the telephone.

The following are instructions, tips, and notes compiled by Dr. David Hodgins and researchers at the Addictive Behaviours lab for utilizing TLFB to retrospectively assess gambling behaviour. The attached manuscript provides a description of a study using TLFB to assess gambling behaviour based upon gambler and collateral report.

The manuscript appears in the Journal of Psychology of Addictive Behaviors and the reference is:

Hodgins, David, C., and Makarchuk, Karyn. (2003). Trusting problem gamblers: Reliability and validity of self-reported gambling behaviour. Psychology of Addictive Behaviors, 17(3), pp. 244-48.

Download TLFB Instructions

Download the TLFB Manuscript

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