TY - JOUR AU - Nitsch, Martina AU - Dimopoulos, Christina N AU - Flaschberger, Edith AU - Saffran, Kristina AU - Kruger, Jenna F AU - Garlock, Lindsay AU - Wilfley, Denise E AU - Taylor, Craig B AU - Jones, Megan PY - 2016 DA - 2016/01/11 TI -一个针对饮食失调患者的在线和移动自助指导项目:迭代参与和可用性研究JO - J Med Internet Res SP - e7 VL - 18 IS - 1kw -可用性研究KW -参与KW -坚持KW -退出KW -数字健康干预KW -在线计划KW -自助KW -饮食失调KW -移动应用程序AB -背景:许多数字健康干预已经开发用于心理健康促进和干预，包括饮食失调。许多干预措施的疗效已得到评估，但关于退出和依从性差的原因的知识很少。大多数数字健康干预研究缺乏适当的研究设计和方法来调查个人参与问题。用户粘性和程序可用性是密不可分的，因此可用性研究对于理解和提高用户粘性至关重要。目的:本研究的目的是探索健康身体形象计划的参与和相应的可用性问题，这是一项针对有身体形象问题或饮食失调的个人的指导性在线干预。第二个目的是展示可用性研究的价值，以调查用户粘性。方法:在项目启动之前，我们进行了基于混合方法的迭代可用性研究，将认知访谈和半结构化访谈以及问卷调查相结合。完成了两轮独立的可用性研究，总共测试了9名潜在用户。采用主题分析和描述性统计方法对大声思考任务、访谈和问卷进行分析。 Results: Participants were satisfied with the overall usability of the program. The average usability score was 77.5/100 for the first test round and improved to 83.1/100 after applying modifications for the second iteration. The analysis of the qualitative data revealed five central themes: layout, navigation, content, support, and engagement conditions. The first three themes highlight usability aspects of the program, while the latter two highlight engagement issues. An easy-to-use format, clear wording, the nature of guidance, and opportunity for interactivity were important issues related to usability. The coach support, time investment, and severity of users’ symptoms, the program’s features and effectiveness, trust, anonymity, and affordability were relevant to engagement. Conclusions: This study identified salient usability and engagement features associated with participant motivation to use the Healthy Body Image Program and ultimately helped improve the program prior to its implementation. This research demonstrates that improvements in usability and engagement can be achieved by testing and adjusting intervention design and content prior to program launch. The results are consistent with related research and reinforce the need for further research to identify usage patterns and effective means for reducing dropout. Digital health research should include usability studies prior to efficacy trials to help create more user-friendly programs that have a higher likelihood of “real-world” adoption. SN - 1438-8871 UR - //www.mybigtv.com/2016/1/e7/ UR - https://doi.org/10.2196/jmir.4972 UR - http://www.ncbi.nlm.nih.gov/pubmed/26753539 DO - 10.2196/jmir.4972 ID - info:doi/10.2196/jmir.4972 ER -