Clare Press1, Peter Kok2, Daniel Yon3. 1. Department of Psychological Sciences, Birkbeck, University of London, London, UK. Electronic address: c.press@bbk.ac.uk. 2. Wellcome Centre for Human Neuroimaging, UCL, London, UK. 3. Department of Psychological Sciences, Birkbeck, University of London, London, UK; Department of Psychology, Goldsmiths, University of London, London, UK.