1 Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen 9747, AG, the Netherlands. Electronic address: n.j.gervais@rug.nl.
2 Division for Mental Health and Substance Abuse, Diakonhjemmet Hospital, Oslo, Norway.
3 Department of Psychological and Brain Sciences, University of Massachusetts Amherst, Amherst, MA 01003, USA.