1. Cognitive and Affective Neuroscience Unit , , 8050 Zurich , Switzerland
2. University of Zurich , , 8050 Zurich , Switzerland
3. Neuroscience Center Zurich , , 8050 Zurich , Switzerland
4. University of Zurich and ETH Zurich , , 8050 Zurich , Switzerland
5. Department of Psychology , , 0373 Oslo , Norway
6. University of Oslo , , 0373 Oslo , Norway
7. Center for the Interdisciplinary Study of Language Evolution (ISLE) , , 8050 Zurich , Switzerland