Frechette Mikaela, Fanning Jason, Hsieh Katherine, Rice Laura, Sosnoff Jacob
Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, United States.
Siebel Center for Design, University of Illinois at Urbana-Champaign, Champaign, IL, United States.
JMIR Form Res. 2022 Sep 16;6(9):e32453. doi: 10.2196/32453.
Individuals who use wheelchairs and scooters rarely undergo fall risk screening. Mobile health technology is a possible avenue to provide fall risk assessment. The promise of this approach is dependent upon its usability.
We aimed to determine the usability of a fall risk mobile health app and identify key technology development insights for aging adults who use wheeled devices.
Two rounds (with 5 participants in each round) of usability testing utilizing an iterative design-evaluation process were performed. Participants completed use of the custom-designed fall risk app, Steady-Wheels. To quantify fall risk, the app led participants through 12 demographic questions and 3 progressively more challenging seated balance tasks. Once completed, participants shared insights on the app's usability through semistructured interviews and completion of the Systematic Usability Scale. Testing sessions were recorded and transcribed. Codes were identified within the transcriptions to create themes. Average Systematic Usability Scale scores were calculated for each round.
The first round of testing yielded 2 main themes: ease of use and flexibility of design. Systematic Usability Scale scores ranged from 72.5 to 97.5 with a mean score of 84.5 (SD 11.4). After modifications were made, the second round of testing yielded 2 new themes: app layout and clarity of instruction. Systematic Usability Scale scores improved in the second iteration and ranged from 87.5 to 97.5 with a mean score of 91.9 (SD 4.3).
The mobile health app, Steady-Wheels, has excellent usability and the potential to provide adult wheeled device users with an easy-to-use, remote fall risk assessment tool. Characteristics that promoted usability were guided navigation, large text and radio buttons, clear and brief instructions accompanied by representative illustrations, and simple error recovery. Intuitive fall risk reporting was achieved through the presentation of a single number located on a color-coordinated continuum that delineated low, medium, and high risk.
使用轮椅和踏板车的人很少接受跌倒风险筛查。移动健康技术是提供跌倒风险评估的一条可能途径。这种方法的前景取决于其可用性。
我们旨在确定一款跌倒风险移动健康应用程序的可用性，并为使用轮式设备的老年人确定关键的技术开发见解。
采用迭代设计-评估过程进行了两轮（每轮5名参与者）可用性测试。参与者完成了定制设计的跌倒风险应用程序Steady-Wheels的使用。为了量化跌倒风险，该应用程序引导参与者回答12个人口统计学问题，并完成3项难度逐渐增加的坐姿平衡任务。完成后，参与者通过半结构化访谈和填写系统可用性量表分享了对该应用程序可用性的见解。测试环节进行了记录和转录。在转录内容中确定代码以创建主题。计算每轮的平均系统可用性量表得分。
第一轮测试产生了2个主要主题：易用性和设计灵活性。系统可用性量表得分在72.5至97.5之间，平均得分为84.5（标准差11.4）。进行修改后，第二轮测试产生了2个新主题：应用程序布局和说明清晰度。第二轮迭代中系统可用性量表得分有所提高，在87.5至97.5之间，平均得分为91.9（标准差4.3）。
移动健康应用程序Steady-Wheels具有出色的可用性，有潜力为成年轮式设备使用者提供一个易于使用的远程跌倒风险评估工具。促进可用性的特征包括引导式导航、大字体和单选按钮、配有代表性插图的清晰简短说明以及简单的错误恢复。通过呈现位于颜色协调连续体上的单个数字来直观报告跌倒风险，该连续体划分了低、中、高风险。
