Acceptability, Feasibility, and Outcome Responsiveness of the Joint Effort Mobile App for Promoting Lower-Risk Cannabis Use Among Young Adults: Pilot Randomized Controlled Trial

José Côté   ^{1, 2, 3} , PhD ;   Gabrielle Chicoine   ^{3, 4} , PhD ;   Patricia Auger   ^{2, 3} , MSc ;   Billy Vinette   ^{1, 3} , PhD ;   Geneviève Rouleau   ^{3, 5, 6, 7, 8} , PhD ;   Marc-André Maheu-Cadotte   ¹ , PhD ;   M Gabrielle Pagé   ^{2, 9} , PhD ;   Judith Lapierre   ^{10, 11} , PhD ;   Shalini Lal   ^{2, 12, 13} , PhD ;   Christine Genest   ^{1, 14} , PhD ;   Guillaume Fontaine   ^{15, 16, 17, 18, 19} , PhD ;   Sylvie Cossette   ^{1, 20} , PhD ;   Jinghui Cheng   ²¹ , PhD ;   Didier Jutras-Aswad   ^{2, 22} , MD

¹ Faculty of Nursing, Université de Montréal, Montreal, QC, Canada

² Research Centre, Centre Hospitalier de l’Université de Montréal, Montreal, QC, Canada

³ Research Chair in Innovative Nursing Practices, Montreal, QC, Canada

⁴ Knowledge Translation Program, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada

⁵ Department of Nursing, Université du Québec en Outaouais, Gatineau, QC, Canada

⁶ Institute for Health System Solutions and Virtual Care, Women's College Hospital, Toronto, ON, Canada

⁷ Institut du Savoir Montfort, Ottawa, ON, Canada

⁸ Centre de recherche du Centre intégré de santé et de services sociaux de l’Outaouais, Gatineau, QC, Canada

⁹ Department of Anesthesiology and Pain Medicine, Faculty of Medecine, Université de Montréal, Montreal, QC, Canada

¹⁰ Faculty of Nursing, Université Laval, Québec, QC, Canada

¹¹ Center for Research on Social Innovations, Université Laval, Québec, QC, Canada

¹² School of Rehabilitation, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada

¹³ Research Centre, Douglas Mental Health University Institute, Montreal, QC, Canada

¹⁴ Centre d’étude sur le trauma, Centre de recherche de l’Institut universitaire de santé mentale de Montréal, Montreal, QC, Canada

¹⁵ Ingram School of Nursing, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada

¹⁶ Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, QC, Canada

¹⁷ Centre for Nursing Research, Jewish General Hospital, Montreal, QC, Canada

¹⁸ Viral Hepatitis Clinical Research Program, Kirby Institute, University of New South Wales, Sydney, Sydney, Australia

¹⁹ Centre for Implementation Research, Methodological and Implementation Research Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada

²⁰ Montreal Heart Institute, Montreal, QC, Canada

²¹ Department of Computer Engineering and Software Engineering, Polytechnique Montréal, Montreal, QC, Canada

²² Department of Psychiatry and Addictology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada