Usability of a web-based personal nutrition management tool

Area of Science:

• Human-Computer Interaction
• Health Informatics
• Web Application Design

Background:

• Interactive web applications are increasingly used for personal nutrition management.
• Limited understanding exists regarding the usability of these online tools.
• Evaluating usability is critical for user adoption and effectiveness.

Purpose of the Study:

• To evaluate the usability of the Personal Nutrition Management Tool (PENUMAT).
• To identify specific usability problems within the PENUMAT application.
• To emphasize the value of a multi-method approach for usability assessment.

Main Methods:

• A multi-method approach was employed for in-depth usability analysis.
• Methods included protocol analysis, user interviews, and the System Usability Scale (SUS).
• Ten healthy volunteers participated in the study.

Main Results:

• PENUMAT achieved an overall usability score ranging from 77.5 to 100 (median 88.7).
• Key usability issues were identified in content, navigation, and interactivity.
• Users highly valued the tool's personal and private nature (70%) and feedback features (60%).

Conclusions:

• PENUMAT demonstrates acceptable overall usability but requires improvements in specific areas.
• A multi-method usability analysis is essential for uncovering subtle interface design flaws.
• User-centered design principles should guide the development of nutrition management tools.