1. INTERACT Research Unit, University of Oulu, Oulu, Finland
2. Department of Aesthetics and Communication, Aarhus University, Aarhus, Sweden
3. Department of Computer Science and Engineering, Chalmers University of Technology, Gothenburg, Denmark
4. Department of Aesthetics and Communication, Aarhus University, Aarhus, Denmark
5. Northumbria School of Design, Northumbria University, Newcastle upon Tyne, UK