Stephan Weibelzahl

If you cannot evaluate it, don't bother developing it.

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Journal Articles

• Reiter, J., Weibelzahl, S. & Duden, G. S (2024). ​Would've, could've, should've: a cross-sectional investigation of whether and how healthcare staff's working conditions and mental health symptoms have changed throughout 3 pandemic years. BMJ Open, 14(3), Article e076712​. ​doi: 10.1136/bmjopen-2023-076712

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• Duden, G., Reiter, J., Paswerg, A. & Weibelzahl, S. (2023). Mental Health of Healthcare Professionals during the ongoing COVID-19 Pandemic – a comparative investigation from the 1st and 2nd pandemic year. BMJ Open. doi: 10.1136/bmjopen-2022-067244

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• Rosenbaum, D. & Weibelzahl, S. (2023). Psychological effects of the COVID-19 pandemic on Freelance Professional Musicians / Psychische Auswirkungen der COVID-19-Pandemie bei freiberuflichen Berufsmusiker*innen. Psychotherapie - Psychosomatik - Medizinische Psychologie, online first.

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• Ebermann, C., Selisky, M., & Weibelzahl, S. (2022). Explainable AI: The Effect of Contradictory Decisions and Explanations on Users’ Acceptance of AI Systems. International Journal of Human-Computer Interaction, online first, 1-20. doi: 10.1080/10447318.2022.2126812

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• Weibelzahl, S., Reiter, J., & Duden, G. (2021). Depression and anxiety in healthcare professionals during the COVID-19 pandemic. Epidemiology and Infection, 149, e46. doi:10.1017/S0950268821000303

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• Moldovan, A.-N., Weibelzahl, S. & Hava Muntean, C. (2014). Energy-Aware Mobile Learning: Opportunities and Challenges. IEEE Communications Surveys and Tutorials, 16(1), 234 - 265.

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• Cocea, M. & Weibelzahl, S. (2011). Disengagement Detection in On-line Learning: Validation Studies and Perspectives. IEEE Transactions on Learning Technologies, 4(2), 114-124.

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• Paramythis, A., Weibelzahl, S. & Masthoff, J. (2010). Layered Evaluation of Interactive Adaptive Systems: Framework and Formative Methods. User Modeling and User-Adapted Interaction, 20(5), 383-453.

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• Joyce, D. & Weibelzahl, S. (2011). Student Counseling Services - Using Text Messaging to Lower Barriers to Help Seeking. Innovations in Education & Teaching International, 48(3), 287-299.

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• Cocea, M. & Weibelzahl, S. (2009). Log file analysis for disengagement detection in e-Learning environments. User Modeling and User-Adapted Interaction, 19(4), 341-385.

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• De Bra, P., Kay, J., & Weibelzahl, S. (2009). Introduction to the Special Issue on Personalization, IEEE Transactions on Learning Technologies, 2(1), 1-2.

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• Ras, E., Avram, G., Waterson, P., & Weibelzahl, S. (2005). Using Weblogs for Knowledge Sharing and Learning in Information Spaces. Journal of Universal Computer Science, 11(3), 394-409.

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• Weibelzahl, S. & Weber, G. (2002). Advantages, opportunities, and limits of empirical evaluations: Evaluating adaptive systems. Künstliche Intelligenz, 3/02, 17-20.

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Book Chapters

• Solveig Duden, G., Reiter, J. & Weibelzahl, S. (2021). Unterstützungsmaßnahmen des Arbeitgebers bei psychischen Belastungen des Personals des Gesundheitssystems während der COVID-19-Pandemie. In: SicherheitsCheck Qualitätsmanagement, Arbeitssicherheit und Hygiene. Merching: Forum Verlag Herkert

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• Hayes, P., & Weibelzahl, S. (2016). Text messaging for out-of-class communication: Impact on immediacy and affective learning. In: D. Churchill, J. Lu, T.K.F. Chiu & B. Fox. Mobile Learning Design - Theories and Application (pp. 271-284). Singapore: Springer, doi: 10.1007/978-981-10-0027-0_16.

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• Cawley, O., Weibelzahl, S., Richardson, I., & Delaney, Y. (2014). Incorporating a Self-Directed Learning Pedagogy in the Computing Classroom: Problem-Based Learning as a Means to Improving Software Engineering Learning Outcomes. In: Yu, L. (Ed.), Overcoming Challenges in Software Engineering Education: Delivering Non-Technical Knowledge and Skills (pp. 348-371). Hershey: IGI.

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• Cocea, M. & Weibelzahl, S. (2010). Validation Issues in Educational Data Mining - the case of HTML-Tutor and iHelp. In: C. Romero, S. Ventura, M. Pechenizkiy, R. S.J.d. Baker (Eds.), Handbook of Educational Data Mining (pp. 377-387). Boca Raton: Chapman & Hall/CRC.

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• Hayes, P. & Weibelzahl, S. (2009). Text Messaging to Improve Instructor Immediacy and its Role in Multiplatform E-Learning Systems. In: T. T. Goh. (Ed.), Multiplatform E-Learning Systems and Technologies: Mobile Devices for Ubiquitous ICT-Based Education (pp. 57-71). Hershey: IGI.

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• Gena, C. & Weibelzahl, S. (2007). Usability Engineering for the Adaptive Web. In: P. Brusilovsky, A. Kobsa, W. Nejdl (Eds.), The Adaptive Web: Methods and Strategies of Web Personalization, Lecture Notes in Computer Science, Vol. 4321 (© Springer), pp. 720-762. Berlin: Springer.

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• Waterson, P., Weibelzahl, S., & Pfahl, D. (2005). Software Process Modelling: Socio-Technical Perspectives. In S. Acuna & N. Juristo (Eds.), Software Process Modeling (pp. 111-139) (© Springer Verlag). New York: Springer

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• Weibelzahl, S. (2005). Problems and pitfalls in the evaluation of adaptive systems. In S. Y. Chen & G. D. Magoulas (Eds.), Adaptable and Adaptive Hypermedia Systems (pp. 285-299). Hershey, PA: IRM Press

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• Weber, G., Lippitsch, S., & Weibelzahl, S. (2004). Virtuelle Lernkurse zur Einführung in die Psychologie für Pädagogik- und Lehramtsstudierende. In U. Rinn & D.M. Meister (Eds.), Didaktik und Neue Medien (pp. 149-166). Münster: Waxmann.

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• Weber, G., Kuhl, H.-C., & Weibelzahl, S. (2001). Developing adaptive internet based courses with the authoring system NetCoach. In S. Reich, M. Tzagarakis & P. de Bra (Eds.), Hypermedia: Openness, Structural Awareness, and Adaptivity, Lecture Notes in Computer Science LNCS 2266, (© Springer Verlag) (pp. 226-238). Berlin: Springer.

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Contributions to International Conferences and Workshops

• Weibelzahl, S., Heckmann, D., Herder, E., Müssig, K. & Schildt, J. (2015). Adaptive Recommendations for Patients with Diabetes. In: A. Cristea, J. Masthoff, A. Said & N. Tintarev. Extended Proceedings of the 23rd Conference on User Modeling, Adaptation, and Personalization (UMAP 2015), Dublin, Ireland, June 29 - July 3, 2015.

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• Moldovan, A.-N., Ghergulescu, I., Weibelzahl, S., & Hava Muntean, C. (2013). User-centered EEG-based Multimedia Quality Assessment. Proceedings of IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, June 4-7, 2013, London.

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• Hayes, P., Weibelzahl, S. & Hall, T. (2013). Text-Messaging for Out-of-Class Communication: Impact on Affective Learning. Proceedings of International Conference Mobile Learning 2013, March 14-16, 2013, Lisbon.

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• Hauger, D., Paramythis, A. & Weibelzahl, S. (2011). Using Browser Interaction Data to Determine Page Reading Behavior. In J. A. Konstan, R. Conejo, J. L. Marzo & N. Oliver (Eds.), User Modeling, Adaptation and Personalization: Proceedings of the Nineteenth International Conference, UMAP2011, Lecture Notes in Computer Science LNCS 6787 (© Springer-Verlag) (pp. 147-158). Berlin: Springer.

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• Weibelzahl, S., de Bra, P., Paramythis, A., Ertmer, P. & Desjardins, F. (2008). Adaptive or Collaborative Learning?. In Proceedings of World Conference on Educational Multimedia, Hypermedia and Telecommunications 2008 (pp. 5474-5477). Chesapeake, VA: AACE.

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• Möbs, S., Piombo, C., Batatia, H., & Weibelzahl, S. (2007). A Tool Set Combining Learning Styles Prediction, a Blended Learning Methodology and Facilitator Guidebooks – Towards a Best Mix in Blended Learning. In: Proceedings of International Conference on Interactive Computer Aided Learning, ICL2007, September 26 -28, 2007, Villach, Austria

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• Weibelzahl, S. & Dowling, N.A. (2007). Comparison of On-Line and Blended Learning for Training in UML. In: C. Bunse and L. Thomas (Eds.), Workshop Series on Software Engineering Education in Academia and IndustryWorkshop Series on Software Engineering Education in Academia and Industry, pp. 23-28, Volume 1, Fraunhofer IRB Verlag.

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• Cocea, M., & Weibelzahl, S. (2007). Cross-System Validation of Engagement Prediction from Log Files. In: E. Duval, R. Klamma, & M. Wolpers (Eds.), Creating New Learning Experiences on a Global Scale. Second European Conference on Technology Enhanced Learning, EC-TEL 2007, Lecture Notes in Computer Science LNCS 4753 (© Springer Verlag) (pp. 14-25). Berlin: Springer.

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• Hurley, T., & Weibelzahl, S. (2007). Using MotSaRT to Support On-Line Teachers in Student Motivation. In: E. Duval, R. Klamma, & M. Wolpers (Eds.), Creating New Learning Experiences on a Global Scale. Second European Conference on Technology Enhanced Learning, EC-TEL 2007, Lecture Notes in Computer Science LNCS 4753 (© Springer Verlag) (pp. 101-111). Berlin: Springer.

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• Möbs, S., Weibelzahl, S., & Dowling, N.-A. (2007). Supporting facilitators of Blended Learning with guidebooks. Eighth Annual Irish Educational Technology Users' Conference, 24-25 May 2007, Dublin, Ireland.

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• Hurley, T., & Weibelzahl, S. (in press). "MotSaRT" - Motivation Strategies: A Recommender Tool for On-line Learning Facilitators. In Eighth Annual Irish Educational Technology Users' Conference, 24-25 May 2007, Dublin, Ireland.

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• Cocea, M., & Weibelzahl, S. (2007). Eliciting motivation knowledge from log files towards motivation diagnosis for Adaptive Systems. In C. Conati, K. McCoy & G. Paliouras (Eds.), User Modeling 2007. Proceedings of 11th International Conference, UM2007, Lecture Notes in Artificial Intelligence LNAI 4511 (© Springer Verlag) (pp. 197-206). Berlin: Springer

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• Möbs, S. & Weibelzahl, S. (2007). A Ranking-Type Delphi to explore Blended Learning in SMEs. In: Proceedings of Interactive Computer Aided Blended Learning Conference, May 7-9, 2007, Florianopolis, Brazil.

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• Hurley, T., & Weibelzahl, S. (2007). Eliciting adaptation knowledge from on-line tutors to increase motivation. In: C. Conati, K. McCoy & G. Paliouras (Eds.), User Modeling 2007. Proceedings of 11th International Conference, UM2007, Lecture Notes in Artificial Intelligence LNAI 4511 (© Springer Verlag) (pp. 370-374). Berlin: Springer.

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• Cocea, M., & Weibelzahl, S. (2006). Motivation - Included or Excluded From E-Learning. In: Kinshuk, D. G. Sampson, J. M. Spector & P. Isaías (Eds.), IADIS International Conference on Cognition and Exploratory Learning in Digital Age, CELDA 2006, Barcelona, 8-10 December 2006 (pp. 435-437). Lisbon: IADIS.

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• Weibelzahl, S., Jedlitschka, A., & Ayari, B. (2006). Eliciting Requirements for an Adaptive Decision Support System through Structured User Interviews. In: S. Weibelzahl, A. Paramythis, and J. Masthoff (Eds.), Proceedings of the Fifth Workshop on User-Centred Design and Evaluation of Adaptive Systems, held in conjunction with the 4th International Conference on Adaptive Hypermedia & Adaptive Web-based Systems (AH'06), Dublin, Ireland, June 20th, 2006. In: S. Weibelzahl, and A. Cristea (Eds.), AH'06 Workshop Proceedings, pp. 470-478. Dublin, National College of Ireland, ISSN 1649-8623.

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• Joyce, D., & Weibelzahl, S. (2006). Text messaging as a means of lowering barriers to help-seeking in students with depression. In: Proceedings of IADIS International Conference e-Society 2006, Dublin, Ireland (pp. 211-214). Lisbon: IADIS.

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• Hayes, P., Weibelzahl, S., & Hall, T. (2006). Mobile Technologies in Education - Ubiquitous Scaffolding and Support for Undergraduate Students. In Proceedings of IADIS International Conference on Mobile Learning, Trinity College Dublin, July 14-16, 2006 (pp. 308-311): Lisbon: IADS.

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• Kelly, D., & Weibelzahl, S. (2006). Raising confidence levels using motivational contingency design techniques. In Proceedings of International Conference on Intelligent Tutoring Systems (ITS06), 26-30 June 2006, Jhongli, Taiwan, Lecture Notes in Computer Science LNCS 4053 (© Springer) (pp. 535-544). Berlin: Springer.

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• Ras, E., Memmel, M., & Weibelzahl, S. (2005). Integration of e-Learning and Knowledge Management – Barriers, Solutions and Future Issues. In K.-D. Althoff, A. Dengel, R. Bergmann, M. Nick, & T. Roth-Berghofer (Eds.), 3rd Conference Professional Knowledge Management - Experiences and Visions, Lecture Notes in Computer Science LNCS 3782 (© Springer Verlag) (pp. 155-164). Berlin: Springer.

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• Paramythis, A., & Weibelzahl, S. (2005). A decomposition model for the Layered Evaluation of Interactive Adaptive Systems. In Proceedings of the 10th International Conference on User Modeling, UM2005 (pp. 438-442). Berlin: Springer

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• Lahart, O., & Weibelzahl, S. (2004). Music Matters-an ITS for violin students. World Conference on E-Learning in Corp., Govt., Health., & Higher Ed., Vol. 2004, Issue 1 (pp. 1662-1666). Chesapeake, VA: AACE.

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• Ras, E., & Weibelzahl, S. (2004). Embedding Experiences in Micro-Didactical Arrangements. In G. Melnik & H. Holz (Eds.), Advances in Learning Software Organizations. Sixth International Workshop on Learning Software Organizations, LSO 2004, Lecture Notes in Computer Science LNCS 3096, (© Springer Verlag) (pp. 55-66). Berlin: Springer.

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• Avram, G., Ras, E., & Weibelzahl, S. (2004). Using weblogs for eliciting new experiences and creating learning elements for experienced-based information systems. In Proceedings of Fourth International Conference on Knowledge Management, I-KNOW'04, Graz, Austria.

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• Grützner, I., Weibelzahl, S., & Waterson, P. (2004). Improving Courseware Quality through Life-Cycle Encompassing Quality Assurance. In Proceedings of the 2004 ACM symposium on Applied Computing (pp. 946-951). New York: ACM Press.

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• Weibelzahl, S., & Weber, G. (2003). Evaluating the Inference Mechanism of Adaptive Learning Systems. In Brusilovsky, P., Corbett, A. & de Rosis, F. (Eds.), User Modeling: Proceedings of the Ninth International Conference, Lecture Notes in Artificial Intelligence LNAI 2702 (© Springer-Verlag) (pp. 154-168). Berlin: Springer.

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• Weibelzahl, S., & Weber, G. (2002). Adapting to prior knowledge of learners. In de Bra, P., Brusilovsky, P., & Conejo, R. (Eds.), Proceedings of the second international conference on Adaptive Hypermedia and Adaptive Web Based Systems, Malaga, Spain, AH2002 (pp. 448-451) (Lecture Notes in Computer Science LNCS 2347; © Springer-Verlag). Berlin: Springer.

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• Weibelzahl, S. (2001). Evaluation of adaptive systems. In M. Bauer, P. J. Gmytrasiewicz, & J. Vassileva (Eds.), User Modeling 2001: Proceedings of the Eighth International Conference, UM2001, Lecture Notes in Artificial Intelligence LNAI 2109 (© Springer-Verlag) (pp. 292-294). Berlin: Springer.

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Edited Proceedings

• Papadopoulos, G.A., Samaras, G., Weibelzahl, S., Jannach, D., & Santos, O. (2019). UMAP '19: Proceedings of the 27th ACM Conference on User Modeling, Adaptation and Personalization. New York: ACM

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• Carberry, S., Weibelzahl, S. Micarelli, A., & Semerano, G. (Eds.)(2013). User Modeling, Adaptation and Personalization. 21th International Conference, UMAP 2013, Rome, Italy, June 10-14, 2013 Proceedings. Berlin: Springer.

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• Weibelzahl, S., & Cristea, A. (Eds.)(2006). AH'06 Workshop Proceedings.Lecture Notes in Learning and Teaching. Dublin: National College of Ireland, ISSN 1649-8623.

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• Weibelzahl, S., Paramythis, A., & Masthoff, J. (Eds.)(2005). Empirical Evaluation of Adaptive Systems. Proceedings of the Fourth Workshop on Evaluation of Adaptive Systems. Held at the 10th International Conference on User Modeling UM2005, July 2005, Edinburgh, Scotland.

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• Abdecker, A., Bickel, S., Brefeld, U., Drost, I., Henze, N., Herden, O., Minor, M., Scheffer, T., Stojanovic, L., & Weibelzahl, S. (Eds.). (2004). Lernen - Wissensentdeckung - Adaptivität (LWA2004). Proceedings of the workshop week of the following SIGs within the German Informatics Society (GI): Adaptitivity and User Modeling (ABIS2004), Knowledge Discovery (AKKD 2004), Machine Learning (FGML 2004) and Knowledge and Experience Management (FGWM 2004). Held October 4 - 6, 2004, Humboldt University, Berlin.

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• Weibelzahl, S., & Paramythis, A. (Eds.)(2003). Empirical Evaluation of Adaptive Systems. Proceedings of the Second Workshop on Empirical Evaluation of Adaptive Systems. Held at the Ninth International Conference on User Modeling UM2003, June 2003, Johnstown, PA.

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• Weibelzahl, S., Chin, D., & Weber, G. (Eds.). (2001). Empirical Evaluation of Adaptive Systems. Proceedings of workshop at the Eighth International Conference on User Modeling, UM2001. Freiburg.

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Other Publications

• Weibelzahl, S., Herder, E., Rokicki, M., Heckmann, D., Müssig, K. & Schildt, J., (2015). Personalized Advice and Feedback for Diabetes Patients. In: Weisbecker, A., Burmester, M. & Schmidt, A. (Eds.), Mensch und Computer 2015 – Workshopband. Berlin: De Gruyter Oldenbourg. (pp. 305-312).

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• Weibelzahl, S., & Reynolds, A. (2009). Usability Testing of e-Learning in Practice: First Experiences and Lessons Learned. In Proceedings of the I-HCI 2009 Annual Conference (pp. 115-118). Trinity College Dublin, Ireland, September 2009.

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• Weibelzahl, S. & Chihaia, D. (2008). Evaluating the Usability of Adaptive Recommendations. In Proceedings of the workshop week Lernen - Wissensentdeckung - Adaptivität (LWA2008) , October 6-8, 2008, pp. 55-58, University of Würzburg. (pp. 55-58).

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• Möbs, S., & Weibelzahl, S. (2007). Blended Learning: Towards a mix for SMEs - stakeholders and their priorities. In: J. Fong & Fu Lee Wang (Eds.), Blended Learning, Workshop on Blended Learning (WBL2007), held at 6th International Conference on Web-based Learning (ICWL' 2007), 15-17 August 2007, Edinburgh, United Kingdom, pp. 162-173.

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• Cocea, M., & Weibelzahl, S. (2006). Can log files analysis estimate learners' level of motivation? In: Proceedings of the workshop week Lernen - Wissensentdeckung - Adaptivität (LWA2006), October 9-11, 2006, pp. 32-35, University of Hildesheim, Hildesheim.

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• Möbs, S., & Weibelzahl, S. (2006). Towards a good mix in Blended Learning for Small and Medium-sized Enterprises – Outline of a Delphi Study. In E. Tomadaki and P. Scott (Eds.), Innovative Approaches for Learning and Knowledge Sharing, EC-TEL 2006 Workshops Proceedings, 1-4 October 2006, Crete, Greece, ISSN 1613-0073 (pp. 10-17). Milton Keynes: Open University.

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• Memmel, M., Ras, E., Weibelzahl, S., & Burgos, D. (2006). Joint International Workshop on Professional Learning, Competence Development and Knowledge Management-LOKMOL and L3NCD. In E. Tomadaki & P. Scott (Eds.), Innovative Approaches for Learning and KnowledgeSharing, EC-TEL 2006 Workshops Proceedings, 1-4 October 2006, Crete, Greece, ISSN 1613-0073, (pp. 108-114). Milton Keynes: Open University.

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• Weibelzahl, S., & Kelly, D. (2005). Adaptation to Motivational States in Educational Systems. In: Proceedings of the workshop week Lernen - Wissensentdeckung - Adaptivität (LWA2005), October 11 - 13, 2005, pp. 80-84, Saarland University, Saarbrücken.

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• Kelly, D., Weibelzahl, S., O'Loughlin, E., Pathak, P., Arnedillo Sánchez, M., & Gledhill, V. (2005). e-Learning Research & Development Roadmap for Ireland(Tech. Rep.). Dublin: National College of Ireland.

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• Ras, E., Memmel, M., & Weibelzahl, S. (2005). First Workshop on Learner-Oriented Knowledge Management & KM-oriented E-Learning (LOKMOL 2005). In K.-D. Althoff, A. Dengel, R. Bergmann, M. Nick, & T. Roth-Berghofer (Eds.), WM 2005: Professional Knowledge Management - Experiences and Visions, Contributions to the 3rd Conference Professional Knowledge Management - Experiences and Visions, 10-13 April 2005, Kaiserslautern, Germany (pp. 124-129). DFKI, Kaiserslautern.

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• Jedlitschka, A., Ayari, B., & Weibelzahl, S. (2004). Is it worthwhile to model users of a tool in support of SE technology selection. In Proceedings of Lernen - Wissensentdeckung - Adaptivität (LWA2004), October 4-6, 2004, Humboldt University (pp. 36-41). Berlin.

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• Jedlitschka, A., & Weibelzahl, S. (2003). Towards an adaptive improvement management framework. In Proceedings of the German Workshop on Adaptivity and User Modeling in Interactive Systems, ABIS03, Karlsruhe.

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• Weibelzahl, S. (2003). Evaluation of Adaptive Systems. Dissertation. Trier: University of Trier.

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• Weibelzahl, S., Lippitsch, S., & Weber, G. (2002). Supporting the authoring of Adaptive Hypermedia with structural information? In Henze, N., Kókai, G., Schröder, O., and Zeidler, J. (Eds.), Personalization for the Mobile World. Proceedings of the German Workshop on Adaptivity and User Modeling in Interactive Systems, ABIS02 (pp. 99-105), Hannover.

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• Lippitsch, S., Weibelzahl, S., & Weber, G. (2002). Improving structural salience by content adaptation with summaries. In N. Henze, G. Kókai, O. Schröder, & J. Zeidler (Eds.), Personalization for the Mobile World. Proceedings of the German Workshop on Adaptivity and User Modeling in Interactive Systems, ABIS02 (pp. 35-38). Hannover.

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• Strasser, A., Riedewald, S., & Weibelzahl, S. (2002). Tagungsbericht: 5. Fachtagung der Gesellschaft für Kognitionswissenschaft (KogWis01). Kognitionswissenschaft, 9(4), 193-196

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• Weibelzahl, S., & Weber, G. (2001). A database of empirical evaluations of adaptive systems. In R. Klinkenberg, S. Rüping, A. Fick, N. Henze, C. Herzog, R. Molitor & O. Schröder (Eds.), Proceedings of Workshop Lernen - Lehren - Wissen - Adaptivität (LLWA 01); research report in computer science nr. 763 (pp. 302-306). University of Dortmund.

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• Weibelzahl, S., & Weber, G. (2001). Mental models for navigation in adaptive web-sites and behavioral complexity. In T. Arnold & C. S. Herrmann (Eds.), Cognitive Systems & Mechanisms. Abstracts of the Fifth Annual Meeting of the German Cognitive Science Society in Leipzig, KogWis 2001 (p. 74). Leipzig: Leipziger Universitätsverlag.

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• Weibelzahl, S., & Lauer, C. U. (2001). Framework for the evaluation of adaptive CBR-systems. In I. Vollrath, S. Schmitt & U. Reimer (Eds.), Experience Management as Reuse of Knowledge. Proceedings of the 9th German Workshop on Case Based Reasoning, GWCBR2001 (pp. 254-263). Baden-Baden, Germany.

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• Weibelzahl, S., & Weber, G. (2000). Evaluation adaptiver Systeme und Verhaltenskomplexität. In M.E. Müller (ed.). Proceedings of the 7th Workshop Adaptivität und Benutzermodellierung in Interaktiven Softwaresystemen, ABIS-2000. (pp. 105 - 115).

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• Weibelzahl, S., Bergmann, R., & Weber, G. (2000). Towards an Empirical Evaluation of CBR-Approaches to Product Recommendation - In Electronic Shops. In M. Göker (ed.), Proceedings of the 8th German Workshop on Case Based Reasoning, (GWCBR2000), (pp. 3 - 12). Lämmerbückel.

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• Weibelzahl, S., & Weber, G. (1999). Benutzermodellierung von Kundenwünschen durch Fallbasiertes Schließen. In T. Jörding (ed.). Proceedings of the 6th Workshop Adaptivität und Benutzermodellierung in Interaktiven Softwaresystemen, ABIS-99. (pp. 295 - 300).

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• Weibelzahl, S. (1999). Conception, Implementation, and Evaluation of a Case Based Learning System for Sales Support in the Internet. Unpublished diploma thesis University of Trier.

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