1 Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 9RJ, United Kingdom; Department of Experimental Psychology, University of Oxford, Oxford, OX2 6 GG, United Kingdom. Electronic address: Victoria.williamson@kcl.ac.uk.
2 Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, SE5 9RJ, United Kingdom.
3 Oxford University Hospitals NHS Foundation Trust, Headley Way, Oxford, OX3 9DU, United Kingdom.