1. Center for Human-Computer Interaction, Christian Doppler Laboratory "Contextual Interfaces" & Department of Computer Sciences, University of Salzburg, Salzburg, Austria
2. CARISSMA, University of Applied Sciences, Ingolstadt, Ingolstadt, Germany
3. Ergonomics & System Design, Institute of Ergonomics & Human Factors, Mechanical Engineering, Technische Universität Darmstadt, Darmstadt, Germany
4. Interactive Systems Group, University of Duisburg-Essen, Duisburg, Germany