1. Department of Psychology, Carnegie Mellon University, Pittsburgh, PA 15213, USA
2. Department of Psychology, University of California-Berkeley, Berkeley, CA 94720, USA
3. School of Psychology and Neuroscience, University of St. Andrews, St Andrews KY16 9AJ, UK
4. School of Anthropology, University of Arizona, Tucson, AZ 85719, USA
5. College of Veterinary Medicine, University of Arizona, Tucson, AZ 85719, USA
6. Center for Interdisciplinary Brain Sciences Research, Division of Brain Sciences, Department of Psychiatry and Behavioral Sciences, School of Medicine, Stanford University, Stanford, CA 94305, USA
7. Department of Psychology and Language Research Center, Georgia State University, Atlanta, GA 30302, USA
8. Psychology Program, Berea College, Berea, KY 40403, USA
9. Department of Psychology, Utah State University, Logan, UT 84322, USA
10. Behavioral and Social Sciences Department, Western Colorado University, Gunnison, CO 81231, USA
11. Animal Physiology Unit, Institute of Neurobiology, University of Tübingen, Tübingen 72076, Germany
12. Department of Psychology, Agnes Scott College, Decatur, GA 30030, USA
13. Domestication Lab, Konrad Lorenz Institute of Ethology, Department of Interdisciplinary Life Sciences, University of Veterinary Medicine Vienna, Savoyenstrasse 1a, Vienna 1160, Austria
14. Department of Psychology and Center for Brain, Biology and Behavior, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
15. Inuyama, Aichi 484-0000, Japan
16. MTA-ELTE Comparative Ethology Research Group, Eötvös Loránd University of Sciences (ELTE), Budapest 1117, Hungary
17. Department of Ethology, Eötvös Loránd University of Sciences (ELTE), Budapest 1117, Hungary
18. Department of Psychology, Oakland University, Rochester, MI 48309, USA