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A Web-Based Interactive Tool to Reduce Childhood Obesity Risk in Urban Minority Youth: Usability Testing Study
Sandra Verdaguer1,2, Katrina F Mateo1,2, Katarzyna Wyka2
1School of Urban Public Health, Hunter College, The City University of New York, New York, NY, United States.
JMIR Formative Research
|January 27, 2019
Summary
This study tested a web-based tool to help minority youth reduce childhood obesity risk. Usability testing showed positive engagement, with improvements made after initial feedback.
Area of Science:
- Public Health
- Human-Computer Interaction
- Pediatric Health
Background:
- Childhood obesity is a significant public health concern, particularly affecting minority youth in the U.S.
- Technology-driven interventions show promise for promoting healthy lifestyle changes in children.
- Addressing childhood obesity requires culturally relevant and engaging approaches for diverse populations.
Purpose of the Study:
- To evaluate the usability of a Web-based interactive tool designed to promote healthy dietary behaviors and mitigate childhood obesity risk.
- The tool features a manga-style comic, interactive elements, tailored messaging, and goal-setting functionalities, optimized for tablet devices.
- Focus on urban, minority youth (Latino and Black/African American) aged 9–13 years.
Main Methods:
- Two rounds of usability testing were conducted with 12 minority children (ages 9–13) using a modified think-aloud protocol.
- User feedback was systematically collected through audio recordings, field notes, and self-reported surveys.
- Quantitative data were analyzed using descriptive statistics, while qualitative data were coded for positive comments and usability issues.
Main Results:
- Participants reported positive experiences with the tool's storyline, sound effects, and visual design.
- Key usability themes identified included appearance, content, special effects, storyline, terminology, and navigation.
- Post-round 1 modifications, such as adding a navigation guide and enhancing icon visibility, led to the resolution of many identified issues in round 2.
Conclusions:
- The usability testing results will guide the further development and refinement of the interactive tool.
- The finalized tool is slated for a two-group pilot randomized study to assess its efficacy in reducing childhood obesity risk.
- The intervention aims to support minority, low-income youth in adopting healthier dietary habits.
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