Delwyn Catley

Delwyn Catley, Ph.D., is a Research Professor in the Department of Psychology at San Diego State University's College of Sciences. His research program focuses on health behavior change interventions, particularly examining tobacco cessation, motivational interviewing techniques, and chronic disease prevention in marginalized populations. Dr. Catley has led multiple NIH-funded clinical trials evaluating behavioral interventions across the biopsychosocial continuum.

His primary research examines:

• Development of culturally adapted smoking cessation programs
• Mechanisms of motivational interviewing efficacy
• Diabetes prevention in low-resource settings
• Health policy implementation (e.g., Tobacco 21 laws)
• Digital health interventions for behavior change

Recent publications demonstrate a strong focus on health equity, with studies spanning neurobehavioral mechanisms, community-based trials, and policy evaluations. Research consistently addresses disparities affecting African American, Latino, and South African communities.

Dr. Catley maintains an extensive publication record with 123 scholarly works. Recent articles (2020-2025) cluster around:

• Smoking cessation interventions and mechanisms
• Global health adaptations of evidence-based programs
• Health policy evaluation
• mHealth implementation
• Behavioral trial methodologies

His work appears in high-impact journals including JAMA Internal Medicine, PLoS Medicine, and Pediatrics.