1. CoMPLEX, University College London, London, UKInstitute of Ophthalmology, University College London, London, UKa.rider@ucl.ac.uk
2. NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Japanshinyanishida@mac.comhttp://www.kecl.ntt.co.jp/people/nishida.shinya/index.html
3. CoMPLEX, University College London, London, UKExperimental Psychology, University College London, London, UKSchool of Psychology, University of Nottingham, Nottingham, UKAlan.Johnston@nottingham.ac.uk