Background:Despite increased research interest in smartphone mental health applications (MHapps), few studies have examined user engagement and its determinants. MoodMission is a MHapp that targets low mood and anxiety via evidence-based techniques including behavioural activation (BA).Aims:The present study aimed to investigate (i) whether BA interventions delivered with visual psychoeducation had greater engagement than BA interventions delivered with solely written psychoeducation, (ii) whether BA interventions targeting mastery would have greater engagement than those targeting pleasure, and (iii) the relationship between level of engagement and MHapp benefit.Method:Participants downloaded MoodMission and completed activities and within-app evaluations over a 30-day period. Data from 238 MoodMission users were analysed via multi-level modelling and linear regression.Results:The average number of app-based activities completed was 5.46 and the average self-reported engagement level was in the low to moderate range. As hypothesized, higher levels of engagement significantly predicted more positive activity appraisal.Conclusions:The results suggest that BA technique beliefs are involved in MHapp engagement and future research examining user appraisals of techniques is warranted.

中文翻译：

---

参与智能手机提供的行为激活干预：对 MoodMission 智能手机应用程序的研究

背景：尽管对智能手机心理健康应用程序 (MHapps) 的研究兴趣增加，但很少有研究检查用户参与度及其决定因素。MoodMission 是一个 MHapp，它通过包括行为激活 (BA) 在内的循证技术针对情绪低落和焦虑。 目的：本研究旨在调查 (i) 通过视觉心理教育提供的 BA 干预是否比仅以书面形式提供的 BA 干预具有更大的参与度心理教育，(ii) 以掌握为目标的 BA 干预是否比以快乐为目标的干预具有更大的参与度，以及 (iii) 参与程度与 MHapp 收益之间的关系。方法：参与者下载 MoodMission 并完成活动和应用内评估超过 30-日期间。通过多层次建模和线性回归分析了来自 238 名 MoodMission 用户的数据。结果：平均完成的基于应用程序的活动数量为 5.46，平均自我报告的参与度处于中低范围。正如假设的那样，更高水平的参与显着预测更积极的活动评估。结论：结果表明，BA 技术信念与 MHapp 参与有关，未来研究检查用户对技术的评估是有必要的。