- Imitation in neonatal chimpanzees (Pan troglodytes)Masako Myowa-Yamakoshi
School of Human Cultures, The University of Shiga Prefecture, Japan
Dev Sci 7:437-42. 2004..The relationship between the disappearance of neonatal imitation and the development of social communicative behavior is discussed from an evolutionary perspective...
- Preference for human direct gaze in infant chimpanzees (Pan troglodytes)Masako Myowa-Yamakoshi
Primate Research Institute, Kyoto University, Inuyama, 484 8506 Aichi, Japan
Cognition 89:B53-64. 2003..The relationship between gaze perception, face processing, and the adaptive significance of gaze perception are discussed from an evolutionary perspective...
- New observations of ant-dipping techniques in wild chimpanzees at Bossou, GuineaGen Yamakoshi
Graduate School of Asian and African Area Studies, Kyoto University, 46 Yoshida Shimoadachicho, Sakyo ku, Kyoto 606 8501, Japan
Primates 45:25-32. 2004..In terms of overall behavioral repertoire in ant dipping, the Bossou pattern appears more similar to that of Gombe than Taï. This may be explained by the difference in target ant species...
- Contagious yawning in chimpanzeesJames R Anderson
Department of Psychology, University of Stirling, Stirling FK9 4LA, UK
Proc Biol Sci 271:S468-70. 2004..Contagious yawning is thought to be based on the capacity for empathy. Contagious yawning in chimpanzees provides further evidence that these apes may possess advanced self-awareness and empathic abilities...
- Group differences in the mutual gaze of chimpanzees (Pan troglodytes)Kim A Bard
Department of Psychology, Centre for the Study of Emotion, University of Portsmouth, Portsmouth, United Kingdom
Dev Psychol 41:616-24. 2005..The importance of mutual gaze is best understood within a perspective that embraces both cross-species and cross-cultural data...