Acceptability, Validity, and Engagement With a Mobile App for Frequent, Continuous Multiyear Assessment of Youth Health Behaviors (mNCANDA): Mixed Methods Study

Kevin M Cummins   ^{1, 2, 3} , PhD ;   Ty Brumback   ⁴ , PhD ;   Tammy Chung   ⁵ , PhD ;   Raeanne C Moore   ² , PhD ;   Trevor Henthorn   ⁶ , MAEd ;   Sonja Eberson   ² , MA ;   Alyssa Lopez   ⁷ , BSc ;   Tatev Sarkissyan   ⁸ , MA ;   Kate B Nooner   ⁹ , PhD ;   Sandra A Brown   ^{1, 2} , PhD ;   Susan F Tapert   ² , PhD

¹ Department of Psychology, University of California San Diego, La Jolla, CA, United States

² Department of Psychiatry, School of Medicine, University of California San Diego, La Jolla, CA, United States

³ Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, United States

⁴ Department of Psychology, Northern Kentucky University, Highland Heights, KY, CA, United States

⁵ Department of Psychiatry, Institute for Health, Healthcare Policy and Aging Research, New Brunswick, NJ, United States

⁶ Department of Music, University of California San Diego, La Jolla, CA, CA, United States

⁷ Department of Data Science and Operations, University of Southern California, Los Angeles, CA, United States

⁸ Department of Psychology, California State University Los Angeles, Los Angeles, CA, United States

⁹ Department of Psychology, University of North Carolina Wilmington, Wilmington, NC, CA, United States