Mobile app to help reduce problem gambling

Change 4 Better (C4B): A Smartphone App to Address Problem Gambling

Not applicable Interventional Yale University · NCT06963931

This study is testing whether a mobile app can help people with gambling problems feel better when used alongside regular treatment.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment128 (estimated)
Ages18 Years and up
SexAll
SponsorYale University Academic / other
Locations4 sites (New Haven, Connecticut and 3 other locations)
Trial IDNCT06963931 on ClinicalTrials.gov

What this trial studies

This research evaluates the effectiveness of the Change4Better (C4B) mobile app in reducing problem gambling severity compared to standard treatment. The study involves a 6-month randomized clinical trial for individuals with gambling disorders, who are either enrolled in or seeking outpatient treatment. Participants will be randomly assigned to receive either standard treatment as usual or standard treatment plus access to the C4B app, which is based on cognitive behavioral therapy principles. The app will be managed by the Yale research team and is designed to be used alongside traditional treatment methods.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18 and older who meet the DSM-5 criteria for gambling disorder and are seeking or currently enrolled in outpatient treatment.

Not a fit: Patients with severe cognitive impairment, untreated psychosis, active suicidal ideation, or those requiring medical detoxification for substance dependence may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could provide a valuable tool for individuals struggling with problem gambling, enhancing their treatment outcomes.

How similar studies have performed: Other studies have shown promise in using mobile apps for behavioral health interventions, suggesting potential success for this approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. 18 years of age or older;
2. able to speak, read and write in English;
3. report gambling in the past month (28 days);
4. meet DSM-5 criteria for gambling disorder within past 12 months as determined by the Structured Clinical Interview for Pathological Gambling - DSM-5 version (SCI-PG-DSM);
5. at least mild gambling severity as measured by GSAS (Total \>8)
6. seeking or currently enrolled in treatment for gambling; if seeking treatment, must be deemed appropriate for outpatient level of care by treatment facility clinical team
7. own a smartphone with internet access.

Exclusion Criteria:

1. unwilling or unable to provide informed consent due to severe cognitive impairment or inability to read;
2. deemed to have current untreated psychosis or mania;
3. active suicidal ideation;
4. physical dependence on opioids and/or alcohol requiring medical detoxification.

Where this trial is running

New Haven, Connecticut and 3 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Problem GamblingProblem gamblingmobile app
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.