1. Department of Anthropology, Pennsylvania State University, University Park, PA 16802, USA
2. Center for Brain, Behavior, and Cognition, Pennsylvania State University, University Park, PA 16802, USA
3. School of Education, University of California, Irvine, CA 92697, USA
4. Department of Anthropology, University of Missouri, Columbia, MO 65211, USA
5. Department of Psychology, University of Lethbridge, Lethbridge, Alberta, Canada T1 K 3M4
6. Department of Psychology, Oakland University, Rochester, MI 48309, USA
7. Department of Psychology, Pennsylvania State University, University Park, PA 16802, USA
8. Department of Psychology, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
9. Department of Anthropology, Durham University, Durham DH1 3LE, UK
10. Pongo Foundation, Papenhoeflaan 91, Oudewater 3421XN, The Netherlands
11. Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA
12. OSV Acoustical Associates and Emory University, Atlanta, GA 30322, USA
13. Sezione di Biodiversità Tropicale, Museo delle Scienze, Trento 38122, Italy
14. Department of Anthropology, Humboldt State University, Arcata, CA 95521, USA
15. CIIDIR Unidad Oaxaca, Instituto Politecnico Nacional, Universidad Nacional Autonoma de Mexico, Mexico and C3-Centro de Ciencias de la Complejidad, Mexico 04510, Mexico