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Building a Brief Multidomain Questionnaire for Gambling Dual Disorder: Psychometric Validation and RDoC-Based

Ignacio Basurte-Villamor1,2, Ismael Gomez-Talal3,4,5, Pablo Vega6

  • 1López Ibor Clinic, Madrid, Spain.

International Journal of Methods in Psychiatric Research
|May 14, 2026
PubMed
Summary
This summary is machine-generated.

A new questionnaire effectively measures Gambling Dual Disorder (GDD) severity. This tool aids in stratifying patients and personalizing treatments for co-occurring mental health conditions with gambling disorder.

Keywords:
addictiondual disordersgambling disorderpsychometricsscale developmentscale validation

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Area of Science:

  • Psychiatry and Clinical Psychology
  • Mental Health Assessment
  • Dimensional Psychopathology

Background:

  • Gambling Disorder (GD) often co-occurs with other mental health conditions, forming Gambling Dual Disorder (GDD).
  • GDD is frequently overlooked, necessitating specialized assessment tools.
  • A dimensional, transdiagnostic approach is crucial for understanding GDD complexity.

Purpose of the Study:

  • To develop and validate a brief, multidomain questionnaire for assessing Gambling Dual Disorder (GDD) severity.
  • To utilize a dimensional, transdiagnostic framework for GDD assessment.
  • To create a tool for stratifying GDD severity and guiding integrated interventions.

Main Methods:

  • A 55-item questionnaire was developed and validated across three phases (feasibility, reliability, validity) in treatment-seeking adults with GD.
  • Internal consistency, test-retest reliability, and convergent validity were assessed using established instruments.
  • Exploratory and confirmatory factor analyses were conducted, mapped onto NIMH Research Domain Criteria (RDoC).

Main Results:

  • The questionnaire demonstrated excellent internal consistency (α = 0.93) and moderate test-retest reliability (ICC = 0.29-0.62).
  • Strong convergent validity (r ≈ 0.51-0.72) was observed with reference instruments.
  • A four-factor structure emerged, reflecting emotional distress, impulsivity, social anxiety, and executive dysfunction, enabling clinical stratification.

Conclusions:

  • The developed instrument is a reliable and valid tool for assessing GDD severity.
  • It aligns with the NIMH Research Domain Criteria (RDoC), supporting a transdiagnostic approach.
  • This questionnaire facilitates the stratification of GDD severity and the tailoring of integrated interventions.