Educe University Faculty Information

Profile
Present specialized field
Academic background
Business career
Research Field
Book and thesis
Academic conference presentation
Subject
Main Subject
Educational ability
Developed teaching materials, textbooks, reference books
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（Last updated : 2026-07-18 07:33:01）

YOKOTA Kunihiro
Hiroshima shudo University The Faculty of Health Sciences

Professor

■ Profile

"Why do human being engage in war?"

My research interest originates in this question. Why can the tragedy of war be produced? Why do people often discriminate others? Why do negative images adhere in different groups? Why do people like or hate participating in a group? Why is the psychology as an individual and as a member of a group different? What are advantages or disadvantage of belonging a group? Why does human harm others? Why do people feel negative emotions such as hatred, envy, angry and so on? To begin with, is the human nature fundamentally depraved? To answer these questions, I'm trying to reveal the psychological mechanisms adaptive to intergroup conflict situations by using a laboratory experiment, a questionnaire survey, and a computer simulation from the view of evolutionary and adaptionist approach.

■ Present specialized field

●Specialized field
Intergroup conflict, Discrimination, prejudice, Sex differences, Psychopathy, Social identity, Intergroup emotion
●Keyword
Intergroup conflict, discrimination & prejudice, sex differences, psychopathy
●The main research themes
●Capable of joint research and research consultation content

■ Academic background

1.	1997/04～2001/03	Hokkaido University Faculty of Literature Graduated
2.	2002/04～2004/03	Hokkaido University Graduate School, Division of Letters 〔Master degree program〕 Completed
3.	2004/04～2009/03	Hokkaido University Graduate School, Division of Letters 〔Doctoral course〕 Completed

■ Business career

1.	2017/04～2018/03	Hiroshima shudo University The Faculty of Health Sciences Associate Professor
2.	2018/04～	Hiroshima shudo University The Faculty of Health Sciences Professor

■ Research Field

1.	2021/07～	Derogation and aggression generated by group's closeness (Key Word : )
2.	2017/04～2020/03	The empirical study of social influence in intergroup conflict situation (Key Word : )
3.	2012/04～2014/03	The evolution of frequency dependent tendency: The experimental study of the booster effect of intergroup conflict (Key Word : )

■ Book and thesis

1.	Book	Chapter 9 The social and evolutional factors of personality (Single) 2020/05
2.	Thesis	Do Men Become Warriors? — An Empirical Test of the Male Warrior Hypothesis. (Collaboration) 2025/11
3.	Thesis	Conformist bias in an information seeking situation: The between-participants design replication study. (Collaboration) 2024/07
4.	Thesis	Cooperative tendency in psychopathy: Moderating effects of social value orientation. (Collaboration) 2024/06
5.	Thesis	An empirical study of the“ 80/20 rule” using two types of group tasks (Collaboration) 2024/04
6.	Thesis	Can conformity bias be observed in questions whose answers are objectively fixed? (Collaboration) 2023/10
7.	Thesis	Can conformity bias transcend domain specificity under social dilemma situations? (Collaboration) 2023
8.	Thesis	Can Scientific Literacy Reduce Purchase Avoidance of Fukushima Products? (Collaboration) 2022/10
9.	Thesis	Psychological mechanisms of ingroup cooperation among real groups and salience of intergroup situation (Collaboration) 2022/08
10.	Thesis	Can Individual Reference to Others’ Behaviour Foster a Cooperative Group in Intergroup Conflict Situations? (Collaboration) 2022/05
11.	Thesis	The mediation effect of intimacy on the relationship between relational mobility and loneliness. (Single) 2022/05
12.	Thesis	External validity of the benign and malicious envy scale with Japanese undergraduate student and non-student samples. (Collaboration) 2022/04
13.	Thesis	Ingroup cooperation among Japanese baseball fans using the one-shot prisoner's dilemma game. (Collaboration) 2021/10
14.	Thesis	Ingroup cooperation among Japanese baseball fans using the one-shot prisoner’s dilemma game. (Collaboration) 2021/04
15.	Thesis	A Conceptual Replication of the Male Warrior Hypothesis Using the Outgroup Threat Priming Method. (Collaboration) 2019/04
16.	Thesis	Ingroup cooperation among Japanese baseball fans of a team in a vignette experiment (Collaboration) 2018/12
17.	Thesis	The external validity of the relationship between social dominance orientation and political or discriminatory attitudes toward foreigners using a Japanese sample (Collaboration) 2018/12
18.	Thesis	Effect of Intergroup Conflict on Ingroup Cooperation and Conformity: A Experimental Vignette Data. (Collaboration) 2017/10
19.	Thesis	Evolutionary root of gender differences in aggression behavior (Single) 2017/07
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■ Academic conference presentation

1.	2023/04/19	Can the behavioural equilibrium follow the 80/20 rule in human beings? (Anual conference for the European Human Behavior and Evilution Association 2023)
2.	2023/04/19	Conformity bias and task demonstrability in information searching (Anual conference for the European Human Behavior and Evilution Association 2023)
3.	2021/09/01	Can majority conformity bias be observed?
4.	2020/12/13	Is the male warrior hypothesis valid to explain males' intergroup aggression?
5.	2020/12/13	The effects of SVO and age on ingroup cooperative behavior of high psychopathy.
6.	2019/12/07	The experiment on two types of cooperation signaling (Japanese Human Behavior and Evolution Society)
7.	2019/12/07	The ingroup favoritism in the face recognition task using the minimal group with Japanese samples (Japanese Human Behavior and Evolution Society)
8.	2019/12/07	The relationship between psychopathic traits and allocation behavior using the manipulation of the expectation value of relationship maintenance (Japanese Human Behavior and Evolution Society)
9.	2018/12/02	Two types of Ingroup cooperation against adaptive tasks - One-shot Prisoners Dilemma game with Japanese baseball fan samples (11th annual meeting of the Japanese Human and Behavior and Evolution Society)
10.	2018/07/05	Two types of ingroup cooperation, group-based and reciprocity-based psychological mechanisms. (30th annual meeting of the Human Behavior and Evolution Society)
11.	2017/10/28	Ingroup favouritism in Japanese baseball fans - The validity of Social Identity Theory and Generalized Reciprocity Hypothesis
12.	2017/10/28	The operational sex ratio and expectation of ingroup cooperation - The analysis using a company data -
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■ Subject

1.	Advanced Statistical Methods of Psychology
2.	Applied Psychology I
3.	Applied Psychology II
4.	Graduation Thesis
5.	Group Dynamics
6.	Psychological Experiments Ⅲ
7.	Psychological Experiments Ⅳ
8.	Psychological Statistics I
9.	Psychological Statistics II
10.	Research Seminar in Psychology Ⅰ
11.	Research Seminar in Psychology Ⅱ
12.	Research Seminar in Psychology Ⅲ
13.	Research Seminar in Psychology Ⅳ
14.	Special Research in Psychology:Lecture
15.	Special Studies in Research Methods of Psychology
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■ Main Subject

Applied Psychology

■ Educational ability

● Practice example of education method
1.	2010/04/01～2013/03/31	Educational guidance on research program of psychology
● Made textbook and teaching material
1.	2017/02/01～	Preparation of a manual for beginners of HAD usesor

■ Developed teaching materials, textbooks, reference books

1.	2021/06 Contribution Type : 単著
2.	2021/09 Contribution Type : 単著
3.	2022/09 Contribution Type : 単著
4.	2023/04 Contribution Type : 単著
5.	2025/02 Contribution Type : 単著
6.	2025/04 Contribution Type : 共同編集
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■ Image