Anderson, J., Myowa-Yamakoshi, M., Matsuzawa, T. (2004) Contagious yawning in chimpanzees. Biological Sciences 271: S468-S470.
Celli, M., Hirata, S., Tomonaga, M. (2004) Socioecological influences on tool use behaviour of captive chimpanzees. International Journal of Primatology 25: 1267-1281.
Humle, T., Matsuzawa, T. (2004) Oil palm use by adjacent communities of chimpanzees at Bossou and Nimba Mountains, West Africa. International Journal of Primatology 25(3): 551-581.
Kuwahata, H., Adachi, I., Fujita, K., Tomonaga, M., Matsuzawa, T. (2004) Development of schematic face preference in macaque monkeys. Behavioral Processes 66(1): 17-21.
Morokuma, S., Fukushima, K., Kawai, N., Tomonaga, M., Satoh, S., Nakano, H. (2004) Fetal habituation correlates with functional brain development. Behavioural Brain Research 153: 459-463.
Myowa-Yamakoshi, M., Tomonaga, M., Tanaka, M., Matsuzawa, T. (2004) Imitation in neonatal chimpanzees (Pan troglodytes). Developmental Science 7(4): 437-442.
Myowa-Yamakoshi, M., Yamaguchi, M., Tomonaga, M., Tanaka, M., Matsuzawa, T. (2005) Development of face recognition in infant chimpanzees (Pan troglodytes). Cognitive Development 20: 49-63.
Okamoto, S., Tanaka, M., Tomonaga, M. (2004) Looking Back: The "representational mechanism" of joint attention in an infant chimpanzee (Pan troglodytes). Japanese Psychological Research 46: 236-245.
Ueno, A., Matsuzawa, T. (2004) Food transfer between chimpanzee mothers and their infants. Primates 45: 231-239.
Ueno, A., Ueno, Y., Tomonaga, M. (2004) Facial responses to four basic tastes in newborn rhesus macaques (Macaca mulatta) and chimpanzees (Pan troglodytes). Behavioural Brain Research 154: 261-271.
Ueno, A., Matsuzawa, T. (2005) Response to novel food in infant chimpanzees: Do infants refer to mothers before ingesting food on their own? . Behavioural Processes 68(1): 85-90.
Tomonaga, M., Myowa-Yamakoshi, M., Mizuno, Y., Yamaguchi, M., Kosugi, D., Bard, K., Tanaka, M., Matsuzawa, T. (2004) Development of social cognition in infant chimpanzees (Pan troglodytes): Face recognition, smiling, gaze and the lack of triadic interactions. Japanese Psychological Research 46: 227-235.
Matsuzawa, T., Nakamura, M. (2004) Caregiving: mother-infant relations in chimpanzees. "Encyclopedia of animal behavior": 196-203, (ed. Bekoff, M.) Greenwood press,.
Imura, T., Tomonaga, M., Yamaguchi, M., Yagi, A. (2004) Perception of depth from shading in chinpanzee (Pan troglodytes) and human (Homo sapiens) infants. The 14th Biennial International Conference on Infant Studies (May. 2004, Chicago, USA).
Imura, T., Tomonaga, M., Yagi, A., Yamaguchi, M. (2004) Perception of shape from shading in chimpanzees and humans. The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).
Inoue, S., Matsuzawa, T. (2005) Numerical sequence learning in chimpanzees: a preliminary report. The 3rd HOPE International workshop "Comparative Cognitive Science: Recent topics of avian and primate species" (Mar. 2005, Kyoto, Japan).
Inoue, S., Matsuzawa, T. (2004) Sequential learning using Arabic numerals by chimpanzees. The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).
Matsuno, T., Tomonaga, M. (2004) Contextual effects on the perception of the collision events in chimpanzees (Pan troglodytes) and humans (Homo sapiens). The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).
Matsuzawa, T. (2004) Cognitive development in chimpanzees: participation observation based on triadic relationship. The XXth Congress of the International Primatological Society (Aug. 2004, Torino).
Mikami, A., Nishimura, T., Miwa, T., Matsui, M., Tomonga, M., Tanaka, M., Matsuzawa, T., Suzuki, J., Kato, A., Matsuzbayashi, K., Goto, S., Hashimoto, C. (2004) Developmet of the brain structures in chimpanzee infants. The XXth Congress of the International Primatological Society (Aug. 2004, Trino, Italy).
Mizuno, Y., Tomonaga, M., Takeshita, H. (2004) Crying infants and mother-infant interactions in chimpanzees. The XXth Congress of the International Primatological Society (Aug. 2004, Torino, Italy).
Mizuno, Y., Takeshita, H., Tomonaga, M. (2005) "Crying" in infants and mother-infant interactions in chimpanzees. (Jan. 2005, Kyoto, Japan).
Ohashi, G. (2005) Behavioral repertoire of tool use in the wild chimpanzees at Bossou. . The 3rd HOPE International Workshop "Comparative Cognitive Science: Recent topics of avian and primate species" (Mar. 2005, Kyoto, Japan).
Tanaka, M. (2005) Categorical discrimination between food and non-food in chimpanzees. The 3rd HOPE International Workshop "Comparative Cognitive Science: Recent topics of avian and primate species" (Mar. 2005, Kyoto, Japan).
Tanaka, M., Mizuno, Y., Yamamoto, S. (2004) Visual preference for photos of primates by mother-reared chimpanzee infants. The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).
Tomonaga, M. (2004) Chimpanzee social cognition in early life. Kyoto-Michigan Collaboration in Psychology 2nd Symposium (Apr. 2004, Kyoto, Japan).
Tomonaga, M. (2004) Is the chimpanzee's attention reflexively triggered by gaze and the other social cues? . The XXth Congress of the International Primatological Society (Aug. 2004, Torino).
Tomonaga, M., Tanaka, M., Matsuzawa, T. (2004) Use of touch-sensitive screens for the study of the chimpanzee's perception and cognition. The XXth Congress of the International Primatological Society, Symposium "Uses of Technology in the study of cognition in non-human primates" (Aug. 2004, Torino).
Uchikoshi, M., Matsuzawa, T. (2004) Behavioral development of agile gibbons: From birth to late juvenile . The 2nd International Workshop for Young Psychologists on Eevolution and Ddevelopment of Cognition (Nov. 2004, Kyoto, Japan).
Tsutsumi, S., Fujita, K., Tomonaga, M. (2004) Infant macaques' theory of animacy: The role of eyes and fluffiness. The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).
Ueno, A., Ueno, Y., Tomonaga, M. (2005) Affective responses to taste stimuli in newborn rhesus macaques (Macaca mulatta) and chimpanzees (Pan troglodytes). (Jan. 2005, Kyoto, Japan).
Yamamoto, S., Mizuno, Y., Tanaka, M. (2004) Social interaction between two chimpanzees for using tokens to get food. The 2nd International Workshop for Young Psychologists on Evolution and Development of Cognition (Nov. 2004, Kyoto, Japan).