Source [[Book - Digital Therapeutics for Mental Health and Addiction]] However, the association between engagement and outcome is not well understood. Evidence suggests that many people may benefit from 2 weeks of DMH use (Arean et al., 2016) and in the informatics field, engagement with digital health technology has been found to be cyclical, with people having many lapses and re-engagements over time depending on the fit of the tool for the person’s goals and the contexts in which they have engaged with the tool (Epstein, Ping, Fogarty, & Munson, 2015; Lin, Althoff, & Leskovec, 2018). Hence, optimal engagement is not a one-size/context-fits-all phenomenon. Page 37