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TU Berlin

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Stefan Schaffer


Research Field


Research Topics

• Multimodal Human-Computer Interaction
• Model-based Usability Evaluation
• User Modeling


Stefan Schaffer studied Communication Science and Computer Science at the Technical University Berlin. In 2009 he completed his degree and received the Willumeit prize for his Magister thesis. He has joined the research training group prometei and is currently working towards his PhD thesis in the domain of model-based usability evaluation of multimodal systems.


Technische Universität Berlin
Zentrum Mensch-Maschine-Systeme
Graduiertenkolleg prometei
Sekretariat FR 2-6
Franklinstr. 28/29
D-10587 Berlin

Tel: +49 (30) 314 - 29637
Fax: +49 (30) 314 - 25996



Möller, S., Schmidt, S., Engelbrecht, K.-P., Kretzschmar, F., Schulz, M. and Schaffer, S. (2012). Simulating User-system Interactions for Designing Usable Systems. Invited Talk, Informatik-Kolloquium

Möller, S., Schmidt, S., Engelbrecht, K.-P., Kretzschmar, F., Schulz, M., Schaffer, S. and Wältermann, M. (2012). Quality Prediction of Speech-based Services. Invited Talk, Fourteenth ISE Seminar, Faculty of Information Sciences and Engineering

Wechsung, I., Engelbrecht, K.-P., Naumann, A., Möller, S., Schaffer, S. and Schleicher, R. (2010). Investigating modality selection strategies. IEEE workshop on spoken language technology SLT 2010

Wechsung, I., Schaffer, S., Schleicher, R., Naumann, A. and Möller, S. (2010). The Influence of Expertise and Efficiency on Modality Selection Strategies and Perceived Mental Effort. Proceedings of the 11th Annual Conference of the ISCA (Interspeech 2010). International Speech Communication Association (ISCA), 1930–1933.

Link to publication

Metze, F., Wechsung, I., Schaffer, S., Seebode, J. and Möller, S. (2009). Reliable Evaluation of Multimodal Dialog Systems. 13th International Conference on Human-Computer Interaction (HCI International 2009), Part 2. Springer, 75–83.

Link to publication

Schaffer, S. and Minge, M. (2012). Error-prone Voice and Graphical User Interfaces in a Mobile Application. Sprachkommunikation: Beiträge zur 10. ITG-Fachtagung vom 26. bis 28. September 2012 in Braunschweig. VDE-Verlag, 1–4.

Schaffer, S. and Reitter, D. (2012). Modeling Efficiency-guided Modality Choice in Voice and Graphical User Interfaces. 11th International Conference on Cognitive Modeling (ICCM2012). Universitätsverlag der TU Berlin, 253–254.

Schaffer, S., Seebode, J., Wechsung, I., Metze, F. and Kühnel, C. (2009). Influence of User Characteristics on the Usage of Gesture and Speech in a Smart Office Environment. Gesture in Embodied Communication and Human-Computer Interaction 8th International Gesture Workshop, GW 2009

Schaffer, S., Seebode, J., Wechsung, I., Metze, F. and Möller, S. (2009). Benutzerstudien zur Bewertung multimodaler, interaktiver Anzeigetafeln in unterschiedlichen Entwicklungsstufen. Workshop-Proceedings der Tagung Mensch und Computer 2009. Logos Berlin, 22–27.

Link to publication

Seebode, J., Schaffer, S., Wechsung, I. and Metze, F. (2009). Influence of Training on Direct and Indirect Measures for the Evaluation of Multimodal Systems. 10th Annual Conference of the International Speech Communication Association (Interspeech 2009)

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