Engaging Users in the Behavior Change Process With Digitalized Motivational Interviewing and Gamification : Development and Feasibility Testing of the Precious App - Nurmi, Johanna (University of Cambridge. Behavioural Science Group, Primary Care Unit) ; Knittle, Keegan (University of Helsinki. Faculty of Social Sciences. Discipline of Social Psychology) ; Ginchev, Todor (Aalto University. Communications and Networking Department, School of Electrical Engineering) ; Khattak, Fida (Aalto University. Communications and Networking Department, School of Electrical Engineering) ; Helf, Christopher (University of Vienna. Department of Entertainment Computing) ; Zwickl, Patrick (Austrian Institute of Technology. Center For Digital Safety And Security) ; Castellano-Tejedor, Carmina (Universitat Autònoma de Barcelona. Departament de Psicologia Bàsica, Evolutiva i de l'Educació) ; Lusilla-Palacios, Pilar (Hospital Universitari Vall d'Hebron) ; Costa-Requena, Jose (Aalto University. Communications and Networking Department, School of Electrical Engineering) ; Ravaja, Niklas (University of Helsinki. Faculty of Medicine. Department of Psychology and Logopedics) ; Haukkala, Ari (University of Helsinki. Helsinki Collegium for Advanced Studies)