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Trusting problem gamblers: reliability and validity of self-reported gambling behavior
David C Hodgins1, Karyn Makarchuk
1Dept of Psychology, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada. dhodgins@ucalgary.ca
Summary
Self-reported gambling behavior in problem gamblers shows good reliability over time. While some overreporting occurred, self-reports are generally valid for research, supporting their use in studies.
Area of Science:
- Psychology
- Behavioral Science
Background:
- Assessing gambling behavior is crucial for understanding and treating problem gambling.
- Reliability and validity of self-reported data are essential for accurate research findings.
Purpose of the Study:
- To evaluate the retest reliability and validity of self-reported gambling behavior in problem gamblers.
- To assess agreement between gambler self-reports and collateral reports.
Main Methods:
- Two samples of problem gamblers were assessed using the timeline follow-back interview procedure.
- Retest reliability was measured over a 2- to 3-week period.
- Agreement with collaterals (e.g., spouses) was assessed.
Main Results:
- Self-reported gambling days and money spent showed good retest reliability (ICCs from .61 to .98).
- Gamblers reported significantly more gambling at the second interview.
- Agreement with collaterals was fair to good (ICCs from .46 to .65), with no consistent over- or underreporting bias.
Conclusions:
- Self-reported gambling behavior is generally reliable and valid for research on problem gamblers.
- Face-to-face and telephone assessments appear suitable.
- Further research is recommended to refine assessment methods.