We contrast three perspectives on engagement from three projects on the design of Digital Behavior Change Interventions (DBCIs), all conducted as part of the PhD thesis of the second author. We provide a reflection on this work with respect to engagement, discussing the motivation, the assumed effects of engagement, the measures of engagements and key insights of each project, as the well as the strategies employed to increase engagement.

翻译：我们从三个项目中对参与度的三种视角进行了对比，这些项目均围绕数字行为改变干预措施（DBCI）的设计展开，且均为第二作者博士论文的一部分。我们针对这些工作进行反思，讨论其动机、对参与度的预期效果、参与度的测量方法、每个项目的主要见解，以及用于提升参与度的策略。