Michael Moutoussis1, Eran Eldar2, Raymond J Dolan3. 1. Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom. Electronic address: m.moutoussis@ucl.ac.uk. 2. Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom. 3. Wellcome Trust Centre for Neuroimaging, University College London, London, United Kingdom; Max Planck-University College London Centre for Computational Psychiatry and Ageing Research, London, United Kingdom.