Evaluation of the Accuracy, Usability, and User Perspectives of the Ecological Momentary Dietary Assessment App Traqq Among Dutch Adolescents: Protocol for a Mixed Methods Study
Lieke L E Kennes, Desiree A Lucassen, Anouk M M Vaes, Annemarie Wagemakers, Indre Kalinauskaite, Edith J M Feskens, Elske M Brouwer-Brolsma

TL;DR
This study evaluates a smartphone app called Traqq for tracking dietary intake among Dutch adolescents, focusing on accuracy, usability, and user experience.
Contribution
The study introduces a mixed-methods evaluation of Traqq's suitability for adolescents, a population with unique dietary tracking challenges.
Findings
Traqq was used by 98 out of 102 adolescents, with high completion rates for dietary data collection.
Usability and user perspectives were assessed through questionnaires and interviews to inform app customization.
The study combines quantitative and qualitative methods to improve dietary assessment accuracy in adolescents.
Abstract
Self-reported dietary intake data are crucial in nutrition and health research; however, their accuracy is compromised by challenges such as portion size estimations, food identification, memory-related bias, social desirability bias, and reactivity bias. Dietary assessment in adolescents is particularly challenging due to irregular eating habits, meal skipping, and parent or peer influences, potentially resulting in misreporting. Leveraging adolescents’ receptiveness to technology, we investigated the use of an innovative smartphone app (Traqq) that facilitates dietary assessment using repeated short recalls instead of traditional 24-hour recalls. Evaluation studies of the Traqq app in Dutch adults have shown successful results, but its suitability for other target populations, such as adolescents, requires further investigation. We designed a comprehensive, 3-phase study to evaluate…
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Taxonomy
TopicsMobile Health and mHealth Applications · Innovative Human-Technology Interaction · Persona Design and Applications
