Patricia Kanngiesser1, Jan K Woike2. 1. Department of Developmental and Comparative Psychology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, Leipzig 04103, Germany kanngiesser@eva.mpg.de. 2. Center for Adaptive Rationality, Max Planck Institute for Human Development, Lentzeallee 94, Berlin 14195, Germany.