Measuring and fostering engagement with mental health e-coaches Chollet, Gérard Torres, María Inés Esposito, Anna Callejas Carrión, Zoraida Griol Barres, David Benghazi Akhlaki, Kawtar Noguera García, Manuel This preprint follows ACM policy: “Authors who publish with ACM have the freedom to post peer-reviewed pre-print versions of their papers to personal websites and institutional repositories. They can add a single-click link to their final published papers, and re-use any portion of their published work with the inclusion of a citation and DOI link. Authors can also post on any repository legally mandated by the agency funding the research on which the work is based, and on any non-commercial repository or aggregation that does not duplicate ACM tables of contents/substantially duplicate an ACM-copyrighted volume or issue” (https://authors.acm.org/author-resources/author-rights.) Mental health e-coaches and technology-delivered services are showing considerable benefits to foster mental health literacy, monitor symptoms, favour self-management of different mental health conditions and scaffold positive behaviours. However, adherence to these systems is usually low and generally declines over time. There exists a recent body of work addressing engagement with mental health technology with the aim to understand the factors that influence sustained use and inform the design of systems that are able to generate sufficient engagement to attain their expected results. This paper explores the different facets of engagement in mental health e-coaches, including aspects related to the estimation of system use from log data, effective engagement, user experience, motivation, incentives, user expectations, peer support and the specific challenges of technologies addressed to mental health. 2020-12-09T11:51:07Z 2020-12-09T11:51:07Z 2020 info:eu-repo/semantics/article Zoraida Callejas, David Griol, Kawtar Benghazi, Manuel Noguera, Gerard Chollet, María Inés Torres, and Anna Esposito. 2020. Measuring and Fostering Engagement with Mental Health e-Coaches. In Companion Publication of the 2020 International Conference on Multimodal Interaction (ICMI ’20 Companion), October 25–29, 2020, Virtual event, Netherlands. ACM, NewYork, NY, USA, 5 pages. https://doi.org/10.1145/3395035.342531 http://hdl.handle.net/10481/64761 10.1145/3395035.342531 eng info:eu-repo/grantAgreement/EC/H2020/823907 info:eu-repo/semantics/openAccess ACM