Marcos Nadal1, Martin Skov2,3. 1. Department of Psychology, University of the Balearic Islands, Palma de Mallorca 07122, Spain marcos.nadal@uib.es. 2. Danish Research Centre for Magnetic Resonance, Copenhagen University Hospital Hvidovre, Copenhagen 2650, Denmark. 3. Center for Decision Neuroscience, Copenhagen Business School, Copenhagen 2000, Denmark.