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- “Asynchronous Coaching of Initial Teacher Students” by Ralph Hooreman. Univ of Eindhoven. Copromotor. 2008
- “The Computer as a Metacognitive Tool for Gaming” by Philip Bonanno. Univ of Joensuu; Ass Promotor. 2008
- “Higher Education ICT Policies” by Maggy McPherson. Sheffield University; Promotion Committee Member. 2007
- “Ethnographic Factors in Mathematics and Computer Science” by Matti Tedre. Co-promotor. University of Joensuu. 2006
- “Using generative probabilistic Models for Multimedia Retrieval” by Thijs Westerveld. Member of the Promotion Committee, University of Twente. 2005
- “Reading Intervention Technology in English for the Students of Polytechnic Colleges” by S. Senthilnathan. External Referent, Alagappa University, India, 2004
- “Hypermedia Interaction Design: A Cognitive Constructivist Approach” by Lee Chien Sing. Faculty of Information Technology and Multimedia. External Referent, University, Malaysia. 2004
- “Kritische und nicht kritische Spielstände im Wettkampftennis: Individuelle Leistungsvoraussetzungen und differentielle Leistungsfolgen.” Dr. Maite Iriarte Rego for the title "Doctor Europeus". Universidad Autónoma de Madrid, 2004. Referent.
- "Intelligent Agents for Orientation on the WWW" Lora Aroyo (2001). Univ. of Twente. Internal Advisor
- "Mapping in the Educational and Training Design Process" Svetoslav Stoyanov. 2001. Univ. of Twente. Assistant Promotor
- “Multimedia and Hyperspace”. Jose Bidarra de Almeida; 2001. Universidade Aberta, Lisbon, Portugal. Member of the Promotion Board
- "A Study of the Social and Material Distribution of Cognition". Ilias Karasavvidis. (1995-1998). Univ. of Twente. Member of the Promotion Committee
- "Cognitive Tools for Learning". Anders Broberg; (Dec 1999). Umea, Sweden. Faculty opponent
- "Concept Mapping for History Awareness" Heredina Fernandez; (1996 - 2000). Autonoma University of Madrid. Referent for the International Ph.D. certificate
- "Memory, Cognitive Style and Concept Mapping in Learning Biology” Heling Huai; 2000. Univ. of Twente. Assistant Promotor
- "Concept Mapping as an Epistemic Support Tool" Viatcheslav Bykov; 1997. Kiev, Ac. of Science. External Promotor
- "Learning and Working with Electronic Performance Support Systems" Theo Bastiaens; 1997. Univ. of Twente. Promotion Advisory Board and Opponent
- "Adaptable Courseware" Sjoerd de Vries; (1991-1997). Univ. of Twente. Assistant Promotor
- “Investigating the portability of multimedia learning resources: Design for a "Teaching Models Toolkit"; Zhang Ji-Ping, 1996, University of Twente, advisor
- “Cross-cultural portability of educational software: A communication-oriented approach;” Zhu ZhiTing, 1996, University of Twente, advisor
- "Knowledge Engineering for Courseware Design" Alnoor Ladhani (1992-1996). Univ. of Twente. Member of the Promotion Advisory Board
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