Duchi, L., Servant-Miklos, V., Kooij, L. and Noordegraaf-Eelens, L. 2023. The “Sweet Spot” for Reflection in Problem-oriented Education: Insights From Phenomenographic Action-research. Journal of Problem Based Learning in Higher Education. 11, 1 (May 2023), 1–35. DOI:https://doi.org/10.54337/ojs.jpblhe.v11i1.7370.