About the Authors

Xueni Pan

Affiliation Department of Computer Science, University College London, London, United Kingdom

Marco Gillies

Affiliation Department of Computing, Goldsmiths, University of London, New Cross, London, United Kingdom

Chris Barker

Affiliation Department of Clinical, Educational and Health Psychology, University College London, London, United Kingdom

David M. Clark

Affiliation Department of Experimental Psychology, University of Oxford, Oxford, United Kingdom

Mel Slater

melslater@ub.edu

Affiliations Department of Computer Science, University College London, London, United Kingdom, ICREA-Universitat de Barcelona, EVENT Lab, Facultat de Psicologia, Barcelona, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XP CB DC MS. Performed the experiments: XP MG. Analyzed the data: MS. Contributed reagents/materials/analysis tools: MG. Wrote the paper: MS. Programmed the environment: XP MG.