Verdaguer Sandra, Mateo Katrina F, Wyka Katarzyna, Dennis-Tiwary Tracy A, Leung May May
School of Urban Public Health, Hunter College, The City University of New York, New York, NY, United States.
Graduate School of Public Health and Health Policy, The City University of New York, New York, NY, United States.
JMIR Form Res. 2018 Nov 1;2(2):e21. doi: 10.2196/formative.9747.
Childhood obesity is a serious public health issue among minority youth in the United States. Technology-enhanced approaches can be effective for promoting healthy behavior change.
The purpose of this study was to test the usability of prototypes of a Web-based interactive tool promoting healthy dietary behaviors to reduce childhood obesity risk in urban minority youth. The Web-based tool comprised a manga-style comic with interactive features (eg, sound effects, clickable pop-ups), tailored messaging, and goal setting, and was optimized for use on tablet devices.
Latino and black/African American children ages 9 to 13 years were recruited to participate in two rounds of usability testing. A modified think-aloud method was utilized. Self-reported surveys and field notes were collected. Audio recordings and field notes from usability testing sessions were systematically reviewed by extracting and coding user feedback as either positive comments or usability or negative issues. The quantitative data from self-reported questionnaires were analyzed using descriptive statistics.
Twelve children (four female; eight black/African American) with a mean age of 10.92 (SD 1.16) years participated. Testing highlighted overall positive experiences with the Web-based interactive tool, especially related to storyline, sound effects, and color schemes. Specific usability issues were classified into six themes: appearance, content, special effects, storyline, terminology, and navigation. Changes to the Web-based tool after round 1 included adding a navigation guide, making clickable icons more visible, improving graphic designs, and fixing programming errors. In round 2 of testing (after modifications to the Web-based tool were incorporated), many of the usability issues that were identified in round 1 did not emerge.
Results of testing will inform further development and finalization of the tool, which will be tested using a two-group pilot randomized study, with the goal of reducing childhood obesity risk in minority, low-income youth.
儿童肥胖是美国少数族裔青少年中一个严重的公共卫生问题。技术增强型方法对于促进健康行为改变可能是有效的。
本研究的目的是测试一种基于网络的交互式工具的原型的可用性，该工具旨在促进健康饮食行为，以降低城市少数族裔青少年儿童肥胖的风险。该基于网络的工具包括具有交互式功能（如音效、可点击弹出窗口）、量身定制的信息和目标设定的漫画风格漫画，并针对平板电脑设备进行了优化。
招募了9至13岁的拉丁裔和黑人/非裔美国儿童参加两轮可用性测试。采用了改良的出声思考法。收集了自我报告的调查问卷和现场记录。通过提取和编码用户反馈为积极评论或可用性或负面问题，系统地审查了可用性测试会话的音频记录和现场记录。使用描述性统计分析来自自我报告问卷的定量数据。
12名儿童（4名女性；8名黑人/非裔美国儿童）参与，平均年龄为10.92（标准差1.16）岁。测试突出了对基于网络的交互式工具的总体积极体验，特别是与故事情节、音效和配色方案有关的体验。特定的可用性问题被分为六个主题：外观、内容、特效、故事情节、术语和导航。第一轮测试后对基于网络的工具所做的更改包括添加导航指南、使可点击图标更显眼、改进图形设计以及修复编程错误。在第二轮测试（纳入对基于网络的工具的修改后）中，第一轮测试中发现的许多可用性问题没有再次出现。
测试结果将为该工具的进一步开发和定稿提供信息，该工具将通过两组试点随机研究进行测试，目标是降低少数族裔低收入青少年儿童肥胖的风险。
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