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Peer-Reviewed Papers Google Scholar Citation (Toshikazu Hasegawa)

  • Kutsukake, N., Teramoto, M., Homma, S., Mori, Y., Matsudaira, K., Kobayashi, H., Ishida, T., Okanoya, K., Hasegawa, T. (2012) Individual variation in behavioural reactions  to unfamiliar conspecific vocalisation and hormonal underpinnings in male chimpanzees. Ethology 118:269-280.
  • Akechi, H., Senju, A. Kikuchi, Y., Tojo, Y., Osanai, H., & Hasegawa, T. (2011)  Do children with ASD use referential gaze to learn the name of an object?  An eye-tracking study.  Research in Autism Spectrum Disorders, 5, 1230-1242.
  • Hirata, S., Matsuda, G., Ueno, A., Fuwa, K., Sugama, K., Kusunoki, K., Fukushima, H., Hiraki, K., Tomonaga, M., & Hasegawa, T., (2011)  Event-related potentials in response to subjects’ own names:  A comparison between humans and a chimpanzee.  Communicative & Integrative Biology, 4, 321-323.
  • Ikeda, K., & Hasegawa, T. (2011)  Task  confusion after switching revealed by reductions of error-related ERP components.  Psychophysiology. doi:10.111/j. 1469-8986. 2011. 01295.x
  • Kikuchi, Y., Senju, A., Akechi, H., Tojo, Y., Osanai, H., & Hasegawa, T. (2011) Atypical disengagement from faces and its modulation by the control of eye fixation in children with autism spectrum disorder.  Journal of Autism and Developmental Disorders.  41, 629-645.
  • Lee, S., & Hasegawa, T. (2011)  Bayesian phylogenetic analysis supports an agricultural origin of Japonic languages. Proceedings of the Royal Society B. doi: 10. 1098/rspb.2011.0518
  • Senju, A., Kikuchi, Y., Akechi, H., Tojo, Y., Osanai, H., &  Hasegawa, T. (2011) Atypical modulation of  face-elicited saccades in autism spectrum disorder in a double-step saccade paradigm.  Researc in Autisum Spectrum Disorders, 5, 1264-1269
  • Hasegawa,A., Soma,M., &  Hasegawa, T. (2011)  Male trains and female choice in Java Sparrows: preference for large body size. Ornithol Sci 10: 73–80.
  • Konno, A. Inoue-Murayama, M. & Hasegawa,T.  (2011)  Androgen receptor gene polymorphisms are associated with aggression in Japanese Akita Inu. Biol Let.
  • Yamamoto, R., Teramoto, M., Hayasaka,I., Ikeda, K. Hasegawa,T. & Ishida, T. (2010) Reactivation of lymphocryptovirus (Epstein-Barr virus chimpanzee) and dominance in chimpanzees. Gen Virol 91(Pt 8):2049-53
  • Currie,T. E., Greenhill, S. J., Gray, R. D., Hasegawa, T., & Mace, R.(2010)  Rise and fall of political complexity in island South-East Asia and the Pacific. Nature, 467, 801-804.
  • Kikuchi, Y., Senju, A., Akechi, H., Tojo, Y., Osanai, H.,& Hasegawa, T.(2010)  Atypical disengagement fromfaces and its modulation by the control of eye fixation in children with autism spectrum disorder. J. Autism Dev. Disord., DOI:10.1007/s10803-010-1082-z.
  • Ueno, A., Hirata, S., Fuwa, K., Sugama, K., Kusunoki, K., Matsuda,G., Fukushima, H., Hiraki, K., Tomonaga, M., & Hasegawa, T.(2010)   Brain activity in an awake chimpanzee in response to the sound of her own name. Biol. Lett. 6, 311-313.
  • Akechi, H., Senju, A., Kikuchi, Y., Tojo, Y., Osanai, H.,& Hasegawa, T.(2010)  The effect of gaze direction on the processing of facial expressions in children with autism spectrum disorder: An ERP study. Neuropsychologica, 48, 2841-2851.
  • Senju, A., Southgate, V., Miura, Y., Matsui, T., Hasegawa, T.,Tojo, Y.,Osanai, H.,& Csibra, G. (2010) Absence of spontaneous action anticipation by false belief attribution in children with autism spectrum disorder. Develop. Psychopathol., 22, 353-60.
  • Kato, Y., Hasegawa T. & Okanoya K. (2010) Song preference ofemale Bengalese finches as measured 3 by operant conditioning. J. Ethology  28 (3): 447-453
  • Kato, Y., Kato, M., Hasegawa, T.,& Okanoya, K.(2010)  Song memory in female birds: neuronal activation suggests phonological coding. NeuroReport, 21, 404-409.
  • Fukushima, H., Hirata, S., Ueno, A., Matsuda, G., Fuwa, K., Sugama, K., Kusunoki, K., Hirai, M., Hiraki, K., Tomonaga, M.,& Hasegawa, T.(2010)  Neural correlates of face and object perception in an awake chimpanzee (Pan troglodytes) examined by scalp-surface event-related potentials .PLos One  5(10), e13366. doi:10.1371/journal.pone.0013366.
  • Senju, A., Kikuchi, Y., Akechi, H., Hasegawa, T., Yoshikuni, T.,& Osanai, H.(2009) Does Eye Contact Induce Contagious Yawning in Children with Autism Spectrum Disorder? J Aut Dev Dis 39(11):1598-1602.
  • Irie, N., & Hasegawa, T. (2009) Elephant psychology: What we know and what we would like to know. Japanese Psychol Res 51(3):177.
  • Kutsukake, N., Ikeda, K., Honma, S., Teramoto, M., Mori, Y., Hayasaka, I., Yamamoto, R., Ishida, T., Yoshikawa, Y.& Hasegawa, T.(2009)  Validation of salivary cortisol and testosterone assays in chimpanzees by liquid chromatography-tandem mass spectrometry. Am J Prim 71(8):696-706.
  • Ikebuchi, M., & Hasegawa T. & Bischof, H.-J. (2009) Amygdala and socio-sexual behavior in male zebra finches. Brain Behav E 74(4):250-7.
  • Fujisawa, K., Kutsukake, N. & Hasegawa, T.(2009)Social network analyses of positive and negative relationships among Japanese preschool classmates. Int. J. Behav. Devel., 33,193­-201.
  • Irie-Sugimoto, N., Kobayashi, T., Sato, T.& Hasegawa, T.(2009)  Relative quantity judgment by Asian elephants.   ( Elephas maximus ). Anim. Cognit., 12, 193-199.
  • Akechi, H., Senju, A., Kikuchi, Y., Tojo, Y., Osanai, H.& Hasegawa, T.(2009)  Does gaze direction modulate facial expression processing in children with autism spectrum disorder ? Child Develop., 80, 1134-1146.
  • Kikuchi, Y., Senju, A., Tojo, Y., Osanai, H.,& Hasegawa, T.(2009)  Faces do not capture special attention in children with autism spectrum disorder: A change blindness study. Child Develop., 80, 1421-1433.
  • Takahashi, T., Sakaguchi, K., Oki, M. & Hasegawa, T., (2008) Sex  hormonal modulation of hyperbolic discount factor in men.   Journal of Neuro Science.  Psychology and  Economics. 1 (1):7-16.
  • Fujisawa, K., Kutsukake, N. & Hasegawa T. (2008). The stabilizing role of aggressive children in affiliative social networks among preschoolers. Behaviour. 145: 1577-1600.
  • Takahashi T., Ikeda K., & Hasegawa T., (2008). Salivary alpha-amylase levels and temporal discounting for primary reward under a simulated life-threatening condition. Neuroendocrinology Letters. 29(4):451-3.
  • Irie-Sugimoto, N., Kobayashi, T., Sato, T.& Hasegawa, T. (2008) Evidence of means-end behavior in Asian Elephants (Elephas maximus). Animal Cognition 11:359-365.
  • Ueno, A, Hirata, S, Fuwa, K, Sugama, K, Kusunoki, K, Matsuda, G, Fukushima, H, Hiraki, K, Tomonaga, M. & Hasegawa, T. (2008) Auditory ERPs to stimulus deviance in an awake chimpanzee (Pan troglodytes): Towards hominid cognitive neurosciences. PLoS ONE 3(1). E1442.
  • Otsuka, A., Kuriki, S., Murata, N.& Hasegawa., T. (2008) Neuromagnetic responses to chords are modified by preceding musical scale. neurosci res 60(1):50-.5
  • Takahashi, M. & Hasegawa, T. (2008) Seasonal and diurnal use of eight different call types by Indian Peafowl (Pavo cristatus). Journal of Ethology (doi:10.1007/s10164-007-0078-4).
  • Takahashi, M., Arita, H., Hiraiwa-Hasegawa, M. & Hasegawa, T. (2008) Peahens do not prefer peacocks with more elaborate trains. Animal Behaviour 75: 1209-1219.
  • Senju, A., Maeda, M., Kikuchi, Y., Hasegawa, T., Tojo, Y., & Osanai, H. (2008). Is anyone looking at me? Direct gaze detection in children with and without autism. Brain and Cognition, 67, 127-139.
  • Irie-Sugimoto, N., Kobayashi, T., Sato, T., & Hasegawa, T. (2008) Evidence of means–end behavior in Asian elephants (Elephas maximus). Anim Cogn 11:359–365.
  • Soma, M., Hasegawa, T. & Okanoya, K. (2008) Genetic and developmental effects, and morphological influences on the acoustic structure of individual distance calls in female Bengalese finches Lonchura striata var. domestica. J. Avian Biology. 39: 101-107.
  • Fujisawa K,, Kutsukake N. & Hasegawa T. (2008) Reciprocity of prosocial behavior in Japanese preschool children.International Journal of Behavioral Development. 32,(2):89-97
  • Senju, A., Maeda, M., Kikuchi, Y., Hasegawa, T., Tojo, Y., & Osanai, H. (2007)
Absence of contagious yawning in children with autism spectrum disorder. 
Biology Letters.3(6):706-708
  • Soma, M., Saito, D. S., Hasegawa, T. & Okanoya, K. (2007)
Sex-specific maternal effect on egg mass, laying order, and sibling competition in the Bengalese finch (Lonchura striata var. domestica). 
Behavioral Ecology and Sociobiology. 61: 1695-1705.
  • Sakaguchi, K., Sakai, Y., Ueda, K., & Hasegawa, T. (2007). Robust association between sociosexuality and self-monitoring in heterosexual and non-heterosexual Japanese.  Personality and Individual Differences. 43(4):815-825.
  • Takahashi T, Ikeda K, Hasegawa T (2007) ” A hyperbolic decay of subjective probability of  obtaining delayped rewards.” Behavioral and Brain Functions 3:52
  • Takahashi T, Ikeda K, Hasegawa T (2007)”Social evaluation-induced amylase elevation and economic decision-making in the dictator game in humans.” NeuroEndocrinology Letters. 28(5).
  • Sakaguchi, K., Oki, M., Honma, S., H, Uehara., & Hasegawa, T. (2007) The lower salivary testosterone levels among unmarried and married sexually active men. Journal of Ethology. 25(3):223-229
  • Sakaguchi, K., & Hasegawa, T. (2007) Personality Correlates With the Frequencyof Being Targeted for Unexpected Advances by Strangers. Journal of Applied Social Psychology. 37(5):948-968.
  • Kutsukake, N., Suetugu, N. & Hasegawa, T. (2006) Pattern, distribution and function of greeting behavior among black and white colobus. International Journal of Primatology. 27(5):1271-1291
  • Kunihira, Y., Senju, A., Dairoku, H., Wakabayashi, A.,& Hasegawa, T., (2006) ‘Autistic’ traits in non-autistic Japanese populations: relationships with personality traits and cognitive ability. J Autism Dev Disord 36(4):553-66 PMID 16602034.
  • K Fujisawa, K., Kutsukake, N., &  Hasegawa, T., (2006) Peacemaking and consolation in Japanese preschoolers witnessing peer aggression. J Comp Psychol 120(1):48-57  PMID 16551164.
  • Takahashi, T., Sakaguchi, K., Oki, M., Honma, S., & Hasegawa, T. (2006) Testosterone levels and discounting delayed monetary gains and losses in male humans.” NeuroEndocrinology Letters 27(4):439-444.
  • Senju, A., & Hasegawa, T. (2006) Do the upright eyes have it? Psychonomic Bulletin & Review, 13, 223-228.
  • Soma, M., Takahasi, M., Hasegawa, T. & Okanoya, K. (2006) Trade-offs and correlations among multiple song traits in Bengalese finches. Ornitholgical Science. 5(1): 77-84.
  •  Soma, M., Takahasi, M., Ikebuchi, M., Yamada, H., Suzuki, M., Hasegawa, T. & Okanoya, K. (2006) Early rearing conditions affect the development of body size and song in Bengalese finches. Ethology 112: 1071-1078.
  • Sakaguchi, K., Oki, M., Honma, S., & Hasegawa, T. (2006) Influence of relationship status and personality traits on salivary testosterone among Japanese men. Personality and Individual Differences. 41(6):1077-1087.
  • Sakaguchi, K., & Hasegawa, T. (2006). Person Perception Through Gait Information and Target Choice for Sexual Advances: Comparison of Likely Targets in Experiments and Real Life. Journal of Nonverbal Behavior. 30(2):63-85.
  • Saito, A., Mikami, A., Hosokawa, T., & Hasegawa, T. (2006) Adovantage of dichromats over trichromats in discrimination of color-camoflaged stimuli in humans. Perceptual and motorskills. 102: 3-12.
  • Kutsukake,N. & Hasegawa,T. (2005) Dominance turnover between an alpha and a beta male and dynamics of social   relationships in Japanese macaques. International Journal of Primatology. 26(4): 775-800.
  • Soma, M., Hasegawa, T. & Okanoya, K. (2005) The evolution of song learnimg: A review from a biological perspective. Congnitive Studies, 12(3): 166-176.
  • Kobayashi, T., Hiraki, K. & Hasegawa, T. (2005) Auditory-visual intermodal matching of small numerosities in  6-month-old infants. Developmental Science, 8(5): 409-419.
  • Senju, A., Tojo, Y., Yaguchi, K. & Hasegawa, T. (2005) Deviant gaze processing in children with autism: An ERP study. Neuropsychologia.43: 1297-1306.
  • Senju, A., Hasegawa, T. & Tojo, Y. (2005) Does perceived direct gaze boost detection in adults and children with and without autism? The stare-in-the-crowd effect revisited. Visual Cognition.12(8):1474-1496.
  • Senju, A. & Hasegawa, T. (2005) Direct gaze captures visuospatial attention. Visual Cognition. 12:127-144.
  • Soma, M. & Hasegawa, T. (2004) The effect of social facilitation and social dominance on foraging success of budgerigars in an unfamiliar environment. Behaviour. 141: 1121-1134.
  • Fujisawa-Kutsukake, K., Kutsukake, N., & Hasegawa, T. (2005) Reconciliation pattern after aggression among Japanese preschool children. Aggressive Behavior. 31: 138-152.
  • Kobayashi, T., Hiraki, K., Mugitani, R. & Hasegawa, T. (2004) Baby arithmetic: one object plus one tone. Cognition 91: B23-B34.
  • Senju, A., Tojo, Y., Dairoku, H., & Hasegawa, T. (2004) Reflexive orienting in response to eye gaze and an arrow in children with and without autism. Journal of Child Psychology and Psychiatry. 45(3): 445-458.
  • Saito, A., Mikami, A., Hasegawa, T., Koida, K., Terao, K., Koike, S., Onish, A., Takenaka, O., Teramoto, M., Mori, Y. (2003) Behavioral evidence of color vision deficiency in aprotanomalia chimpanzee. Primates. 44(2): 171-176.
  • Senju, A., Yaguchi, K., Tojo, Y., & Hasegawa, T. (2003) Eye contact does not facilitate response in children with autism. Cognition. 89: B43-B51.
  • Senju, A. & Hasegawa, T. (2003) Is it difficult to look away from other’s direct gaze? : An examination using temporal gap effect. Kisoshinrigaku Kenkyu 22, 33-34.
  • Hiraishi K. & Hasegawa T. (2001) Sharing-rule and detection of free-riders in cooperative groups: Evolutionarily important deontic reasoning in the Wason Selection task.Thinking & Reasoning 7(3): 255-294.
  • M. Daly, M. Wilson, C. A. Salmon, M. Hiraiwa-Hasegawa & T. Hasegawa (2001) Siblicide and seniority. Homicide Studies 5(1): 30-45.
  • Kajikawa S. & Hasegawa T. (2000) Acoustic variation of pant hoot calls by male chimpanzees: a playback experiment. J. Ethol. 18: 133-139.
  • Buss, D.M., Shackelford, T.K., Kirkpatrick, L.A., Choe, J., Hasegawa, M.,Hasegawa, T., & Bennett, K. (1999). Jealousy and beliefs about infidelity: Tests of competing hypotheses about sex differences in the United States, Korea, and Japan. Personal Relationships. 6:125-150.
  • Mitani, C. J., Hasegawa, T., Gros-Louis, J., Marler, P. and Byrne, B. (1992) Dialects in chimpanzees? Am. J. Primatol. 27: 233-243.
  • Yamamura, N., Hasegawa, T. and Ito, Y. (1990) Why mothers do not resist infanticide: A cost-benefit genetic model. Evolution 44(5): 1346-1357.
  • Hiraiwa-Hasegawa, M. and Hasegawa, T. (1988) A case of offsprong desertion by a female chimpanzee and the behavioral changes of the abandoned offspring. Primates 29(3): 319-330.
  • Nishida, T., Hiraiwa-Hasegawa, M. Hasegawa, T. and Takahata, Y. (1985) Group extinction and female transfer in wild chimpanzees in the Mahale National Park, Tanzania. Z. Tierpsychol. 67: 284-301.
  • Takahata, Y. Hasegawa, T. and Nishida, T. (1984) Chimpanzee Predation in the Mahale Mountains from August 1979 to May 1982. Int. J. Primatol. 5(3): 213-233.
  • Hiraiwa-Hasegawa, M., Hasegawa, T. and Nishida, T. (1984) Demographic study of a large-sized unit-group of chimpanzees in the Mahale Mountains, Tanzania: A preliminary report. Primates 25(4): 401-413.
  • Hasegawa, T., Hiraiwa, M., Nishida, T. and Takasaki, H. (1983) New evidence on scavenging behavior in wild chimpanzees. Current Anthrop. 24(2): 231-232.
  • Hasegawa, T. and Hiraiwa-Hasegawa, M. (1983) Opportunistic and restrictive matings among wild chimpanzees in the Mahale Mountains, Tanzania. J. Ethol. 1: 75-85.
  • Hasegawa, T. and Hiraiwa, M. (1980) Social Interactions of orphans observed in a free-ranging troop of Japanese monkeys. Folia Primatol. 33: 129-158.

Book Chapters and Conference Proceedings

  • Sakaguchi, K., Gudberg, K. J. & Hasegawa, T. (2005). Initial interpersonal attracti between mixed-sex dyad and movement synchrony. In: Anolli L, Duncan S, Magnusson M (Eds.), The Hidden Structure of Social Interaction:>From Genomics to Cultural Patterns. Amsterdam: IOS Press. p.108-120.
  • Hiraiwa- Hasegawa M. and Hasegawa T. (1994 ) Infanticide in nonhuman primates: Sexual selection and local resource competition. In: Infanticide and parental care. S. Parmigiani and F. S. vomSaal (eds.) pp.137-154. Harwood Academic pablishers (Chur, Switzerland)
  • Uehara, S., Nishida, T. Hamai, M., Hasegawa, T., Hayaki, H. Huffman, M. A., Kawanaka, K., Kobayashi, S., Mitani, J. C., Takahata, Y., Takasaki, H. and Tsukahara, T. (1992) Characteristics of predation by the chimpanzees in the Mahale Mountains National Park. In: Topics in primatology. T. Nishida et al. (eds.) pp. 143-158. Univ. Tokyo Press (Tokyo).
  • Nishida, T., Hasegawa, T., Hayaki, H. and Takahata, Y. (1992) Meat-sharing as a coalition strategy by an alpha male chimpanzee? In: Topics in primatology. T. Nishida et al. (eds.) pp. 159-174. Univ. Tokyo Press (Tokyo).
  • Hasegawa, T. (1990) Sex differences in ranging patterns. In: The Chimpanzees of the Mahale Mountains. T Nishida (ed.) pp.99-114. Univ. Tokyo Press (Tokyo).
  • Hasegawa, T. (1989) Sexual behavior of immgrant and resident female chimpanzees at Mahale. In: Understanding chimpanzees. P. Heltne and L. A. Marquardt (eds.) pp. 90-103. Harvard University Press (Cambridge).