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Suzuki, H., Funaoi, H., Kubota, Y. & Kato, H. (2019). Developing social capital among learners in collaborative learning through introducing yet another exchange system based on the concept of “bi-directional debt”. In J. Theo Bastiaens (Ed.), Proceedings of EdMedia + Innovate Learning (pp. 1046-1056). Amsterdam, Netherlands: Association for the Advancement of Computing in Education (AACE).