Starting from the assumption that mood has a central role in domain-specific persuasion systems for well-being, the main goal of this study was to investigate the feasibility and acceptability of single-input methods to assess momentary mood as a medium for further interventions in health-related mobile apps destined for mature women. To this aim, we designed a very simple android App providing four user interfaces, each one showing one interactive widget to self-assess mood. Two widgets report a hint about the momentary mood they represent; the last two do not have the hints but were previously refined through questionnaires administered to 63 women (age 45-65) in order to reduce their expressive ambiguity. Next, fifteen women (age 45-65 years) were recruited to use the app for 15 days. Participants were polled about their mood four times a day and data were saved in a remote database. Moreover, users were asked to fill out a preliminary questionnaire, at the first access to the app, and a feedback questionnaire at the end of the testing period. Results appear to prove the feasibility and acceptability of this approach to self-assess momentary mood in the target population and provides some potential input methods to be used in this context.

翻译：基于情绪在面向健康的领域特定说服系统中具有核心作用的假设，本研究旨在探讨单输入方法评估瞬时情绪的可行性与可接受性，以作为面向中老年女性的健康相关移动应用进一步干预的媒介。为此，我们设计了一款极其简单的Android应用程序，提供四种用户界面，每种界面展示一个可自评情绪的交互组件。其中两个组件附带其所代表瞬时情绪的提示；另外两个组件虽无提示，但先前已通过面向63名女性（年龄45-65岁）的问卷进行优化，以降低其表达歧义。随后，我们招募了15名女性（年龄45-65岁）使用该应用15天。参与者每天被询问四次情绪状态，数据保存至远程数据库。此外，用户在首次使用应用时需填写初始问卷，测试期结束时填写反馈问卷。研究结果初步验证了该方法在目标人群中评估瞬时情绪的可行性与可接受性，并为此场景提供了若干潜在输入方法。