1. Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands
2. c.strauch@uu.nl
3. Institute of Media Informatics, Ulm University, Germany
4. teresa.hirzle@uni-ulm.de
5. s.vanderstigchel@uu.nl
6. Institute for Visualisation and Interactive Systems, University of Stuttgart, Germany
7. andreas.bulling@vis.uni-stuttgart.de