Towards interactive explanation-based nutrition virtual coaching systems

by Berk Buzcu, Melissa Tessa, Igor Tchappi, Amro Najjar, Joris Hulstijn, Davide Calvaresi and Reyhan Aydoğan


The awareness about healthy lifestyles is increasing, opening to personalized intelligent health coaching applications. A demand for more than mere suggestions and mechanistic interactions has driven attention to nutrition virtual coaching systems (NVC) as a bridge between human–machine interaction and recommender, informative, persuasive, and argumentation systems. NVC can rely on data-driven opaque mechanisms. Therefore, it is crucial to enable NVC to explain their doing (i.e., engaging the user in discussions (via arguments) about dietary solutions/alternatives). By doing so, transparency, user acceptance, and engagement are expected to be boosted. This study focuses on NVC agents generating personalized food recommendations based on user-specific factors such as allergies, eating habits, lifestyles, and ingredient preferences. In particular, we propose a user-agent negotiation process entailing run-time feedback mechanisms to react to both recommendations and related explanations. Lastly, the study presents the findings obtained by the experiments conducted with multi-background participants to evaluate the acceptability and effectiveness of the proposed system. The results indicate that most participants value the opportunity to provide feedback and receive explanations for recommendations. Additionally, the users are fond of receiving information tailored to their needs. Furthermore, our interactive recommendation system performed better than the corresponding traditional recommendation system in terms of effectiveness regarding the number of agreements and rounds.

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  author       = {Berk Buzcu and
                  Melissa Tessa and
                  Igor Tchappi and
                  Amro Najjar and
                  Joris Hulstijn and
                  Davide Calvaresi and
                  Reyhan Aydogan},
  title        = {Towards interactive explanation-based nutrition virtual coaching systems},
  journal      = {Auton. Agents Multi Agent Syst.},
  volume       = {38},
  number       = {1},
  pages        = {5},
  year         = {2024},
  url          = {},
  doi          = {10.1007/S10458-023-09634-5},
  timestamp    = {Fri, 08 Mar 2024 13:21:53 +0100},
  biburl       = {},
  bibsource    = {dblp computer science bibliography,}