Izawa, Eiichi

写真a

Affiliation

Faculty of Letters, Department of Humanities and Social Science (Human Relations) (Mita)

Position

Professor

Related Websites

Career 【 Display / hide

  • 2002.04
    -
    2004.03

    JSPS doctal research fellow/ Graduate School of Bioagricultural Sciences, Naogya University

  • 2004.04
    -
    2005.12

    JSPS Post-doctal research fellow/ Graduate School of Human relations, Keio University

  • 2006.01
    -
    2008.03

    慶應義塾大学文学研究科 准教授(有期)(魅力ある大学院教育イニシアティブ)

  • 2008.04
    -
    2012.03

    慶應義塾大学社会学研究科 准教授(有期)(人文グローバルCOE”論理と感性に関する先端的教育研究拠点”)

  • 2012.04
    -
    2013.03

    慶應義塾大学 論理と感性のグローバル研究センター, 共同研究員

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Academic Background 【 Display / hide

  • 1999.03

    Nagoya University, School of Science, Department of Physics

    University, Graduated

  • 2003.03

    Nagoya University, Bioagricultural Sciences, Biological Mechanisms and Functions

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 博士(農学), Nagoya University, Coursework, 2003.03

 

Research Areas 【 Display / hide

  • Experimental psychology (Animal Psychology)

  • Neuroethology

 

Books 【 Display / hide

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Papers 【 Display / hide

  • Socio-ecological correlates of neophobia in corvids.

    Miller R, Lambert ML, Frohnwieser A, Brecht KF, Bugnyar T, Crampton I, Garcia-Pelegrin E, Gould K, Greggor AL, Izawa E-I, Kelly DM, Li Z. Luo Y, Luong LB, Massen JJM, Nieder A, Reber SA, Schiestl M, Seguchi A, Sepehri P, Stevens JR, Taylor AH, Wang L, Wolff LM, Zhang Y, and Clayton NS

    Current Biology in press 2022.01

    Research paper (scientific journal), Joint Work, Accepted

  • Scalable representation of time in the hippocampus

    SHIMBO Akihiro, Izawa E-I., Fujisawa Shigeyoshi

    Science Advances 7 ( 6 ) eabd7013 2021.02

    Research paper (scientific journal), Joint Work, Accepted

     View Summary

    Hippocampal “time cells” encode specific moments of temporally organized experiences that may support hippocampal functions for episodic memory. However, little is known about the reorganization of the temporal representation of time cells during changes in temporal structures of episodes. We investigated CA1 neuronal activity during temporal bisection tasks, in which the sets of time intervals to be discriminated were designed to be extended or contracted across the blocks of trials. Assemblies of neurons encoded elapsed time during the interval, and the representation was scaled when the set of interval times was varied. Theta phase precession and theta sequences of time cells were also scalable, and the fine temporal relationships were preserved between pairs in theta cycles. Moreover, theta sequences reflected the rats' decisions on the basis of their time estimation. These findings demonstrate that scalable features of time cells may support the capability of flexible temporal representation for memory formation.

  • Sex-specific effects of cooperative breeding and colonial nesting on prosociality in corvids.

    Horn L., Bugnyar T., Griesser M., Hengl M., Izawa E-I., Oortwijn T., Rössler C., Scheer C., Schiestl M, Suyama M., Taylor AH., Vanhooland L-C., von Bayern AM, Zürcher Y, Massen JJ.

    eLife (eLife)  9   e58139 - 244 2020.10

    Research paper (scientific journal), Joint Work

     View Summary

    © 2020, eLife Sciences Publications Ltd. All rights reserved. The investigation of prosocial behavior is of particular interest from an evolutionary perspective. Comparisons of prosociality across non-human animal species have, however, so far largely focused on primates, and their interpretation is hampered by the diversity of paradigms and procedures used. Here, we present the first systematic comparison of prosocial behavior across multiple species in a taxonomic group outside the primate order, namely the bird family Corvidae. We measured prosociality in eight corvid species, which vary in the expression of cooperative breeding and colonial nesting. We show that cooperative breeding is positively associated with prosocial behavior across species. Also, colonial nesting is associated with a stronger propensity for prosocial behavior, but only in males. The combined results of our study strongly suggest that both cooperative breeding and colonial nesting, which may both rely on heightened social tolerance at the nest, are likely evolutionary pathways to prosocial behavior in corvids.

  • 社会学習による行動伝播の生態学における役割

    持田浩治・香田啓貴・北條賢・高橋宏司・須山巨基・伊澤 栄一・井原泰雄

    日本生態学会誌 70   177 - 195 2020

    Research paper (scientific journal), Joint Work, Accepted

  • Language discrimination by large-billed crows

    Schalz S., Izawa E-I.

    The Evolution of Language: Proceedings of the 13th International Conference (EvoLang13) 13   380 - 389 2020.04

    Research paper (international conference proceedings), Joint Work, Accepted

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Papers, etc., Registered in KOARA 【 Display / hide

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Reviews, Commentaries, etc. 【 Display / hide

  • Understand the evolution of animal behaviour at the different levels: brain/body anatomy and physiology, and behavioural functions

    Ei-Ichi IZAWA

    Science IMPACT (Science Impact Ltd.)  12   70 - 72 2018

    Introduction and explanation (commerce magazine), Single Work

  • カラスから探る社会認知機能の進化 -知性に大脳“皮質”は必要か?-

    伊澤栄一

    科学 (岩波書店)  79   678 - 681 2009

    Introduction and explanation (commerce magazine), Single Work

  • カラスの脳と行動から探る知性の進化

    伊澤栄一

    脳21 (金芳堂)  10   355 - 359 2007

    Introduction and explanation (commerce magazine), Single Work

Research Projects of Competitive Funds, etc. 【 Display / hide

  • 個体間の宥和関係形成を支える脳-内臓回路の比較認知神経科学研究

    2020.04
    -
    2023.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Scientific Research (B), Principal Investigator

  • 身体拡張性の比較心理学

    2019.06
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    2021.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Challenging Research (Exploratory) , Principal Investigator

  • 情動をうみだす脳と身体の協働システムの比較認知神経科学研究

    2017.04
    -
    2020.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Scientific Research (B), Principal Investigator

  • Investigating visuomotor control mechanisms in birds.

    2016.04
    -
    2018.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, 伊澤 栄一, Grant-in-Aid for Challenging Exploratory Research, Principal Investigator

 

Courses Taught 【 Display / hide

  • SEMINAR IN BIOPSYCHOLOGY 2

    2021

  • SEMINAR IN BIOPSYCHOLOGY 1

    2021

  • PHYSIOLOGICAL PSYCHOLOGY AND NEUROPSYCHOLOGY

    2021

  • LABORATORY COURSE IN PSYCHOLOGY 2

    2021

  • LABORATORY COURSE IN PSYCHOLOGY 1

    2021

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Memberships in Academic Societies 【 Display / hide

  • 日本動物心理学会

     
  • 日本動物行動学会

     
  • 日本鳥学会

     
  • 日本動物学会

     
  • 日本比較生理生化学会

     

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Committee Experiences 【 Display / hide

  • 2014.07
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    Present

    理事, 日本動物心理学会

  • 2016.04
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    Present

    科学技術予測センター専門調査員, 文部科学省

  • 2018.01
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    Present

    評議員, 比較生理生化学会

  • 2020.10
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    Present

    連携会員(第25期), 日本学術会議