1. Vision Sciences Laboratory, School of Health Sciences, University of Iceland, Reykjavik, Iceland
2. chh8@hi.is
3. Laboratory of Psychophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
4. david.pascucci@epfl.ch
5. Department of Psychology, University of New Hampshire, Durham, NH, USA
6. omerdaglar.tanrikulu@unh.edu
7. ak@hi.is