Faculty Profiles - IGARASHI Tasuku

写真a

IGARASHI Tasuku

Organization

Graduate School of Education and Human Development Department of Psychology and Human Developmental Sciences Psychological Sciences Associate professor

Graduate School

Graduate School of Education and Human Development

Undergraduate School

School of Education

Contact information

Homepage

https://www.tasukuigarashi.com

External link

Degree 1

PhD (Psychology) （ 2005.3 Nagoya University ）

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Research Interests 3

social networks
group
loneliness

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Research Areas 1

Humanities & Social Sciences / Social psychology

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Research History 9

The University of Melbourne School of Psychological Sciences Honorary Research Fellow

2019.3 - 2020.3
Associate Professor, Graduate School of Education and Human Development, Nagoya University

2012.10

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Country：Japan
Graduate School of Education and Human Development, Nagoya University Associate professor

2012.10
Associate Professor, Department of Management Information, Hokkai Gakuen University

2011.4 - 2012.9

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Country：Japan
Lecturer, Department of Management Information, Hokkai Gakuen University

2009.4 - 2011.3

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Country：Japan
Superative Postdoctoral Research Fellow, Japan Society for the Promotion of Science

2006.4 - 2009.3

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Country：Australia
Visiting Postdoctoral Research Fellow, the University of Melbourne

2005.6 - 2007.3

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Country：Japan
Postdoctoral Research Fellow, Japan Society for the Promotion of Science

2005.4 - 2006.3

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Country：Japan
Research Fellow, Japan Society for the Promotion of Science

2003.4 - 2005.3

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Country：Japan

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Education 3

Nagoya University Graduate School of Education and Human Development

2003.4 - 2005.3

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Country： Japan
Nagoya University Graduate School, Education and Human Development

2001.4 - 2003.3

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Country： Japan
Nagoya University Faculty of Education

- 2001.3

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Country： Japan

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Professional Memberships 4

日本心理学会
日本社会心理学会
日本グループ・ダイナミックス学会
Society for Personality and Social Psychology

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Committee Memberships 9

Japanese Psychological Association Editorial board, Japanese Psychological Research

2021.11

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Committee type：Academic society
日本グループ・ダイナミックス学会常任理事・編集委員

2021.4
日本社会心理学会理事

2021.4
日本グループ・ダイナミックス学会理事・編集委員

2019.4 - 2021.3

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Committee type：Academic society
日本社会心理学会「社会心理学研究」副編集委員長

2017.5 - 2019.3

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Committee type：Academic society
日本社会心理学会理事・編集委員

2015.4 - 2019.3

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Committee type：Academic society
アジア社会心理学会 Consuting Editor

2014.1 - 2017.3

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Committee type：Other
アジア社会心理学会 Executive committee (Treasurer)

2014.1 - 2017.3

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Committee type：Other
日本グループ・ダイナミックス学会理事・編集委員

2013.4 - 2017.3

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Committee type：Academic society

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Awards 10

奨励論文賞

2021 日本社会心理学会援助要請における援助者の切り替え方略：援助者数が援助要請者のストレスに及ぼす影響

古橋健悟,五十嵐祐
学術大会優秀発表賞

2020 日本心理学会社会情報のアンサンブル知覚――パレイドリア図形を用いた群集の視線手がかり課題による検討――

平島太郎, 五十嵐祐
学術大会優秀発表賞

2019 日本心理学会行為者の識別可能性が「巻き添え」を含む報復に与える影響

澤田昂大, 五十嵐祐
Distinguished Presentation Award

2010

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Country：Japan
Distinguished Presentation Award

2007

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Country：Japan
Top Paper, Japan-U.S. Communication Association (JUCA) session

2006

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Country：United States
Outstanding Dissertation Award

2005

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Country：Japan
Jung-heun Park Young Scholar Award

2005

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Country：New Zealand
Japanese Society of Social Psychology

2002

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Country：Japan
Outstanding Student Award

2002

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Country：Japan

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Papers 66

Is Mentalizing Essential to Predict Human Network Size? Reexamining the Social Brain Hypothesis From a Social Network Perspective

Taro Hirashima, Tasuku Igarashi

Letters on Evolutionary Behavioral Science Vol. 13 ( 2 ) page： 50 - 56 2022.10

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Language：English Publishing type：Research paper (scientific journal) Publisher：Human Behavior and Evolution Society of Japan

One central question in social science and evolutionary anthropology is how humans can form and maintain large social networks. The social brain hypothesis argues that humans use their mentalizing ability to read others’ minds for the development of dyadic relationships in layered social networks. However, previous empirical studies have not directly examined the association between mentalizing and the size of the active network located at the outermost layer. By introducing a social network perspective, we predicted that individuals use their mentalizing ability not only to form and maintain dyadic relationships but also to belong to multiple communities, which indirectly expands the active network size. We collected data from undergraduates in Japan (N = 175) to examine how mentalizing is linked to the size of online social networks. Mentalizing was positively associated with the number of dyads but not with the number of communities and the active network size. These findings suggest that the social brain hypothesis has limited validity, and there is a need for more careful explanations surrounding the psychological and structural underpinnings of large human social networks.

DOI： 10.5178/lebs.2022.99
Does Mental Simulation Decrease the Empathy Gap in Help-Seeking?

Kengo Furuhashi, Tasuku Igarashi

Japanese Psychological Research 2022.7

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Language：Japanese Publishing type：Research paper (scientific journal)

People hesitate to seek help when they perceive the cost of helping as high. In general, help-seekers overestimate the cost of helping because of errors in perspective-taking. We examined whether three processes of mental simulation (recalling an experience of providing help, of rejecting a request for help, and of sensing the empathy gap) would decrease the cost of helping perceived by help-seekers. Participants underwent one of the simulations or no simulation (control condition), read two scenarios that described helping and help-seeking, and rated the perceived cost of helping in the scenarios. Contrary to the prediction, simulations did not decrease the cost of helping perceived by help-seekers. Recalling an experience of rejecting requests also increased the perceived cost of helping in unemployment scenarios. The post hoc analysis for controlling the depressive mood in depression scenarios showed that the cost of helping from the helper's perspective decreased, whereas that from the help-seekers remained the same under the empathy-gap simulation condition. These results suggest that realizing the asymmetry between helpers and help-seekers may be counterproductive in help-seeking and widen the empathy gap.

DOI： 10.1111/jpr.12436

Web of Science

Scopus
The Self-perception of Text message Dependence Scale (STDS): A Brazilian-Portuguese validation and expansion of its psychometric properties

Daniel Tornaim Spritzer, Andr{\'{e } } Luiz Monezi Andrade, Aurora Zamora Xavier, Gabriel Teixeira da Silva, Hyoun S. Kim, Katarzyna Kaliszewska-Czeremska, St{\'{e } }phany Laconi, Tasuku Igarashi, Ives Cavalcante Passos, Simone Hauck

Current Psychology 2022.3

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Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media {LLC}

DOI： 10.1007/s12144-022-02957-8

Web of Science
Development of the Japanese Version of the Linguistic Inquiry and Word Count Dictionary 2015

Tasuku Igarashi, Shimpei Okuda, Kazutoshi Sasahara

Frontiers in Psychology Vol. 13 2022.3

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Frontiers Media {SA}

<jats:p>The Linguistic Inquiry and Word Count Dictionary 2015 (LIWC2015) is a standard text analysis dictionary that quantifies the linguistic and psychometric properties of English words. A Japanese version of the LIWC2015 dictionary (J-LIWC2015) has been expected in the fields of natural language processing and cross-cultural research. This study aims to create the J-LIWC2015 through systematic investigations of the original dictionary and Japanese corpora. The entire LIWC2015 dictionary was initially subjected to human and machine translation into Japanese. After verifying the frequency of use of the words in large corpora, frequent words and phrases that are unique to Japanese were added to the dictionary, followed by recategorization by psychologists. The updated dictionary indicated good internal consistency, semantic equivalence with the original LIWC2015 dictionary, and good construct validity in each category. The evidence suggests that the J-LIWC2015 dictionary is a powerful research tool in computational social science to scrutinize the psychological processes behind Japanese texts and promote standardized cross-cultural investigations in combination with LIWC dictionaries in different languages.</jats:p>

DOI： 10.3389/fpsyg.2022.841534

Web of Science
援助要請における援助者選択に関する研究と展望

古橋健悟, 五十嵐祐

名古屋大学大学院教育発達科学研究科紀要. 心理発達科学 Vol. 68 page： 17 - 25 2022.3

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：名古屋大学大学院教育発達科学研究科

DOI： 10.18999/nupsych.68.1.2
社会心理学から「孤独」にアプローチする Invited

五十嵐祐

臨床心理学 Vol. 22 page： 218 - 222 2022.3

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Language：English Publishing type：Research paper (scientific journal)
Processes of Social Influence on Sampling Behavior: The Effect of Other's Positive Attitude and Receiver's Prior Experience

Tsuchiya Koji, Kashima Yoshihisa, Yoshida Toshikazu, Harada Chika, Igarashi Tasuku

JAPANESE PSYCHOLOGICAL RESEARCH Vol. 64 ( 1 ) page： 64 - 72 2022.1

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Wiley

DOI： 10.1111/jpr.12314

Web of Science
Generalized trust and social selection process Reviewed

Tasuku Igarashi, Taro Hirashima

Frontiers in Communication Vol. 6 2021.5

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Authorship：Lead author,　Corresponding author Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Frontiers Media SA

Generalized trust relieves individuals in a socially uncertain situation from dyadic constraints of existing ties and helps them change ties with other individuals to acquire better resources. However, much evidence in the emancipation role of generalized trust as a booster of new relationship formation has been limited to laboratory experiments or cross-sectional surveys. We conducted a four-wave longitudinal survey to test whether individuals high in generalized trust actively switch ties and form open triads in dynamic social networks. Stochastic Actor-Oriented Models were employed to analyze structural changes in advice and personal discussion networks among first-year undergraduates. Results showed the predicted patterns of social selection processes based on generalized trust when the dynamics of the two networks were analyzed simultaneously: only in the advice network, individuals high in generalized trust tended to terminate existing ties, create new ties, and show a decreasing trend toward forming close triads when the degree of local clustering was large. Effective tie-formation strategies of individuals high in generalized trust in a multiplex network structure are discussed.

DOI： 10.3389/fcomm.2021.667082

Web of Science
Odd man out for everyone: The justification of ostracism to maximize the whole group's benefits

Tamai Ryuichi, Igarashi Tasuku

EUROPEAN JOURNAL OF SOCIAL PSYCHOLOGY Vol. 51 ( 2 ) page： 213 - 221 2021.3

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Wiley

DOI： 10.1002/ejsp.2725

Web of Science
Psychometric properties of measures of hedonic and eudaimonic orientations in Japan: The HEMA scale Reviewed

Ryosuke Asano, Saori Tsukamoto, Tasuku Igarashi, Veronika Huta

Current Psychology Vol. 40 ( 1 ) page： 390 - 401 2021.1

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

DOI： 10.1007/s12144-018-9954-z

Web of Science

Other Link： http://link.springer.com/article/10.1007/s12144-018-9954-z/fulltext.html
Odd man out for everyone: The justification of ostracism to maximize the whole group's benefits Reviewed

Tamai, R, Igarashi, T

European Journal of Social Psychology. 2021

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Authorship：Last author Language：English Publishing type：Research paper (scientific journal)

Other Link： https://onlinelibrary.wiley.com/share/author/HSHMN7IBY7JTDVDWVT6U?target=10.1002/ejsp.2725
Processes of social influence on sampling behavior: The effect of other’s positive attitude and receiver’s prior experience Reviewed

Tsuchiya, K, Kashima, Y, Yoshida, T, Harada, C, Igarashi, T

Japanese Psychological Research 2021

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Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
日本語版幸せへの恐れ尺度と日本語版幸せの壊れやすさ尺度の信頼性・妥当性の検討 Reviewed

生田目光, 猪原あゆみ, 浅野良輔, 五十嵐祐, 塚本早織, 沢宮容子

心理学研究 2021

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Language：Japanese Publishing type：Research paper (scientific journal)
Text Mining Approach to Quantify Consumer Psychology and Behavior in COVID-19 Pandemic

SASAHARA Kazutoshi, OKUDA Shimpei, IGARASHI Tasuku

Proceedings of the Annual Conference of JSAI Vol. JSAI2021 ( 0 ) page： 1D3OS3b04 - 1D3OS3b04 2021

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society for Artificial Intelligence

On social media, a variety of information is posted and shared in real time on a daily basis. Many of these posts relate to the impact of the COVID-19 pandemic and consumer life. Such spontaneous “real voices” (texts) from consumers contain potential signals for quantitatively understanding consumer psychology and behavior in the pandemic. In this study, we quantify consumer psychology and behavior from large-scale social data on Twitter, and discuss analytical methods and cases to gain insights into the resale phenomenon in the pandemic. Specifically, by applying our psychological category dictionary “J-LIWC” and moral foundation dictionary “J-MFD” to the above data, we were able to visualize that different consumer emotions were evoked depending on the types of product resold, such as toilet paper or masks, and what kind of moral violation consumers perceived about the resale. Furthermore, by analyzing the above data using a word co-occurrence network, we observed trends in products resoled and changes in purchasing behavior linked to the pandemic’s progression. These findings provide a hint for reconstructing the society and economy toward the post-corona era.

DOI： 10.11517/pjsai.jsai2021.0_1d3os3b04

CiNii Research
Reliability and validity of the japanese versions of the fear of happiness scale and the fragility of happiness scale

Hikari Namatame, Ayumi Inohara, Ryosuke Asano, Tasuku Igarashi, Saori Tsukamoto, Yoko Sawamiya

Shinrigaku Kenkyu Vol. 92 ( 1 ) page： 31 - 39 2021

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

This study investigated the reliability and validity of the Japanese versions of the Fear of Happiness Scale and the Fragility of Happiness Scale. The scales were administered to 341 Japanese undergraduates. Confirmatory factor analysis showed that, like the original versions, the Japanese Fear of Happiness Scale and the Fragility of Happiness Scale each had a one-factor structure. The two scales also each had good internal consistency, test-retest reliability, and construct validity. Furthermore, the scales showed incremental validity by predicting psychological elements (life satisfaction, depression, anxiety, stress) better than the behavioral inhibition system (BIS) and the behavioral activation system (BAS). The results of the present study revealed that the Fear of Happiness Scale and the Fragility of Happiness Scale had an adequate reliability and validity in this Japanese group.

DOI： 10.4992/JJPSY.92.20206

Scopus

CiNii Research
J-LIWC2015による日本語テキスト解析

五十嵐祐, 笹原和俊, 奥田慎平

日本心理学会大会発表論文集 Vol. 85 ( 0 ) page： TWS-003 - TWS-003 2021

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人日本心理学会

計算社会科学の領域において，デジタル化された文字情報（テキストデータ）から書き手の感情状態や心的態度を多面的に推測する，テキストデータ解析の重要性はますます高まっている。本ワークショップでは，発表者らが開発した，テキストデータ解析のデファクト・スタンダードであるLIWC2015の日本語版（J-LIWC2015）について紹介する。ワークショップでは，Pythonによる日本語テキストデータの前処理の方法（MeCabを用いた形態素解析）や，分析の手順について解説を行う。また，データサイエンス領域での活用事例についても紹介する。参加にあたって特別な事前知識は必要としないが，前処理を行うにはコマンドラインでの操作にある程度慣れておく必要がある。また，前処理後の分析には英語版LIWC2015のソフトウェアが必要となるため，手元で分析を行いたい場合は各自で準備されたい。

DOI： 10.4992/pacjpa.85.0_tws-003

CiNii Research
援助場面の想起が援助者・援助要請者が知覚する援助コストに及ぼす影響

古橋健悟, 五十嵐祐

日本心理学会大会発表論文集 Vol. 85 ( 0 ) page： PC-068 - PC-068 2021

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人日本心理学会

問題が生じた際に他者に援助を求める行動である援助要請行動は，問題に対する対処行動として有効である。先行研究では，援助者のコストが大きい場合，援助要請行動は抑制されることが示されている。一方，援助要請者は，援助者のコストを過大評価する傾向がある。本研究では，援助行動の想起を行うことにより，この援助者と援助要請者間の差異を減じることができるかどうかを検討した。実験では，援助体験・援助拒否体験・差異体験（援助者と援助要請者間の差異を感じた体験）を想起することの効果を検討した。参加者にいずれかの想起を行うように求めた後，参加者自身が援助者となるシナリオ・援助要請者となるシナリオのそれぞれについて，援助者のコストを評価するよう求めた。その結果，差異体験の想起により，援助者のコストが低く知覚されることが示された。一方，援助拒否体験の想起により，援助者のコストが高く知覚されることが示された。また，いずれの想起も，援助者・援助要請者間の差異を減じる効果は見られなかった。本研究の結果から，差異体験の想起は，援助行動・援助要請行動を促進する介入に繋がる可能性が示唆された。

DOI： 10.4992/pacjpa.85.0_pc-068

CiNii Research
「小さなシグナル」に耳を澄ます—クラウド型ソフトウェアが拓く，新たな時代の学生・研究体験創造—

五十嵐祐, 辻野真平, 中嶋祐一, 久崎智子, 栃木哲郎

日本心理学会大会発表論文集 Vol. 85 ( 0 ) page： IS-001 - IS-001 2021

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：公益社団法人日本心理学会

研究をより速く，より正確に行うための手段を，より簡単に，より多くのユーザーに提供できるよう，調査プラットフォームは従来のデスクトップ型から今日のクラウド型のソフトウェアへと進化してきた。また，テクノロジーの進化やパンデミックは，教室・大学の在り方にも大きな変化を及ぼしている。本シンポジウムでは，今年の 5 月に更に使いやすく進化した，クアルトリクスのクラウド型調査プラットフォームの全体像とともに，クアルトリクスのスーパーユーザーとして日本語版クアルトリクスマニュアル（非公式版）執筆を独自に手がけた五十嵐氏から，具体的なユースケースをご紹介いただく。また，刻々と進化を続ける時代の変化を検知・観察・分析する手法として，クアルトリクスは「XM（エクスペリエンス管理）」を提唱している。同社のXMソリューションストラテジーディレクターである久崎から，XM の視点を活用することによって開けてくる，新たな時代の学生・研究体験を作り上げていくための地平について紹介する。

DOI： 10.4992/pacjpa.85.0_is-001

CiNii Research
Switching helpers: Effect of number of helpers on help-seekers’ stress

Furuhashi Kengo, Igarashi Tasuku

Japanese Journal of Social Psychology Vol. 36 ( 2 ) page： 39 - 48 2020.11

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Social Psychology

Repeated help-seeking from the same helper produces gradually stronger hesitation. Therefore, switching helpers in one’s social network could be an effective strategy. We conducted an online experiment to examine whether people feel less stressed if they switch helpers in a repeated help-seeking situation. After reading a vignette about a stressful situation (depression or unemployment), participants judged the level of stress and chose a helper in their social network. Participants then received feedback that the situation had not improved even after help had been given and repeated the choice five times. The results showed that participants perceived lower stress in both depression and unemployment situations if they sought help from a greater number of helpers after controlling for social network size and diversity of helpers. The effectiveness of switching helpers and its mechanisms are discussed.

DOI： 10.14966/jssp.1931

CiNii Research
Does a reduction in subjective value due to delaying extra reward promote donation?

Kurita Maho, Igarashi Tasuku, Kiyokawa Sachiko

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 84 ( 0 ) page： PC-102 - PC-102 2020.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.84.0_pc-102

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The effects of perceived helpers’ cost on the helper selection

Furuhashi Kengo, Igarashi Tasuku, Kiyokawa Sachiko

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 84 ( 0 ) page： PC-015 - PC-015 2020.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.84.0_pc-015

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Crowd gaze cueing effects by pareidolia faces: Is ensemble perception of social information different processes from those of low-level physical information?

Hirashima Taro, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 84 ( 0 ) page： PI-073 - PI-073 2020.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.84.0_pi-073

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“I'll give it to you if it's such a ‘small' amount”: Prosocial behavior based on delay discounting and micro-donation

Kurita Maho, Igarashi Tasuku, Kiyokawa Sachiko

Cognitive Studies: Bulletin of the Japanese Cognitive Science Society Vol. 27 ( 3 ) page： 345 - 355 2020.9

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Language：English Publishing type：Research paper (scientific journal) Publisher：Japanese Cognitive Science Society

Charitable donations play an important role in the upliftment of a society. This study examines how to facilitate donations by subjective value of the money. Previous studies have shown that people generally discount delayed value of a reward with delay of receipt. We conducted an online experiment in which an extra reward was handed out by lottery to participants and they were asked to make a judgment on the extra reward, and used a 3 (amount of extra reward: 50/500/1000 yen) × 2 (delay: a day/a month) design resulting in six conditions. We hypothesized that the smaller the amount of an extra reward and the more it is delayed, the lower the subjective value of the reward becomes, and the more people would be willing to donate. Two-hundred and two undergraduates were randomly assigned to one of the six conditions. They were asked to answer a questionnaire measuring participants' delay-discounting rates, social value orientation (SVO), subjective socioeconomic status (subjective SES), and money beliefs. They were then told they had received an extra reward and were required to choose one of three options for the delayed extra reward: receive, reject, or donate. The results showed that a smaller extra reward and higher delay-discounting rates increased donation choice, but we could not obtain the effect of the delay in time until the participants received the extra reward. Therefore, we concluded that reducing the subjective value of the money could promote donation.

DOI： 10.11225/cs.2020.032

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I’ll give it to you if it’s such a ‘small’ amount: Prosocial behavior based on delay discounting and micro-donation. Reviewed

Kurita, M, Igarashi, T, Kiyokawa, S

Cognitive Studies: Bulletin of the Japanese Cognitive Science Society Vol. 27 ( 3 ) page： 345 - 355 2020.9

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Language：English Publishing type：Research paper (scientific journal)
SNSにおけるプライバシー設定機能の利用動機と個人情報の記載行動との関連：大学生のTwitterユーザーを対象とした検討 Reviewed

澤田昂大, 五十嵐祐

社会情報学 Vol. 8 ( 3 ) page： 177 - 189 2020.8

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Language：Japanese Publishing type：Research paper (scientific journal)
Motivations and Behaviors for Ensuring Privacy on Twitter

SAWADA Gota, IGARASHI Tasuku

Socio-Informatics Vol. 8 ( 3 ) page： 177 - 189 2020.7

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Socio-Informatics

The purpose of this study is to examine what factors motivate Twitter users to use a protected account and how these factors relate to self-disclose on their profile pages. Based on the interviews with 14 undergraduates using Twitter, we developed a questionnaire measuring motivations to use privacy settings on Twitter. We then conducted a survey on 153 undergraduates to report their Twitter usage and personal information disclosed online. Exploratory factor analysis identified three motivational factors to use privacy settings on Twitter: the boundary control for self-disclosure, the avoidance of troubles, and social influence. Logistic regression analysis was conducted to predict which motivational factors prevent or promote users to put personal information on their profile accessible in public. The boundary control motivation was negatively related to the disclosure of real names in public. In contrast, the social influence motivation was positively related to the disclosure of private information, such as facial photos on the public profile. Lower graders and females were also likely to disclose in public than higher graders and males, respectively. The current study implies that motivational factors other than privacy concerns lead people to protect or disclose themselves on social networking services.

DOI： 10.14836/ssi.8.3_177

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Overchoosing: A Mechanism of Tie-Formation in Social Networks

Tasuku Igarashi, Johank Koskinen

PsyArXiv 2020.6

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Authorship：Lead author Language：English Publishing type：Research paper (other academic) Publisher：Center for Open Science

We introduce the concept of overchoosing as a fundamental mechanism of tie formation in directed social networks. The parameter represents a tendency for actors to send a lot of ties but receive few nominations back, something which implies the importance of modeling reciprocity violation as a basic tie-formation process. Analyzing large friendship network data (N = 1,575) by the stochastic actor-oriented models revealed that, under controlling for several endogenous tie formation processes, the parameter captured the formation of open triads and substantially improved the goodness of fit of the model to the data.

DOI： 10.31234/osf.io/47q39
The Hedonic and Eudaimonic Motives for Activities: Measurement Invariance and Psychometric Properties in an Adult Japanese Sample Reviewed

Ryosuke Asano, Tasuku Igarashi, Saori Tsukamoto

Frontiers in Psychology Vol. 11 page： 1220 2020.6

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Frontiers Media SA

DOI： 10.3389/fpsyg.2020.01220

Web of Science
孤独感と対人関係の再帰的な構築 Reviewed

五十嵐祐

心理学評論 Vol. 63 page： 403 - 417 2020

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Loneliness and the recursive formation of social environments

Igarashi Tasuku

JAPANESE PSYCHOLOGICAL REVIEW Vol. 63 ( 4 ) page： 403 - 417 2020

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：JAPANESE PSYCHOLOGICAL REVIEW

Tackling loneliness is a challenging task in modern society. Recent research has focused primarily on the physiological nature of loneliness. However, the multifaceted psychological construct is clearly more than just a negative emotion. The virtue of helping each other can be undermined by the process in which loneliness breeds maladaptive social perception and behavior that also facilitate the avoidance of lonely individuals. To cut off the vicious cycle of loneliness, comprehending the dynamic nature of loneliness and social networks through the lens of social information processing is important. After introducing the conceptualization of loneliness, this paper discusses the process by which individuals feel isolated in dyadic/networked social connections, the social selection and influence mechanisms of loneliness, the distinction between loneliness and solitude, the current advances and limitation of loneliness interventions, and the importance of providing opportunities for social interactions for the lonely to deal with this modern disease.

DOI： 10.24602/sjpr.63.4_403

CiNii Research
孤独感と対人関係の再帰的な構築 Invited Reviewed

五十嵐祐

心理学評論 Vol. 63 ( 4 ) page： 403 - 417 2020

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File：心理学評論63-4P403-417五十嵐論文.pdf
援助要請における援助者の切り替え方略：援助者数が援助要請者のストレスに及ぼす影響 Reviewed

古橋健悟, 五十嵐祐

社会心理学研究 2020

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Authorship：Last author Language：Japanese Publishing type：Research paper (scientific journal)
Inhibition of social pain for the execution of ostracizing under the name of utilitarianism

Tamai Ryuichi, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 83 ( 0 ) page： 2B-022 - 2B-022 2019.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.83.0_2b-022

CiNii Research
Indiscriminative retaliation under unidentifiability

Sawada Gota, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 83 ( 0 ) page： 3B-018 - 3B-018 2019.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.83.0_3b-018

CiNii Research
Psychometric properties of the Japanese version of the Imposing Memory Task (IMT-J) among Japanese adults

Hirashima Taro, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 83 ( 0 ) page： 3B-068 - 3B-068 2019.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.83.0_3b-068

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Approval of ostracism as a legal sanction: The justification effect of utilitarian rationale Reviewed

Tamai Ryuichi, Igarashi Tasuku

The Japanese journal of psychology Vol. 90 ( 2 ) page： 187 - 193 2019.6

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

Ostracism is a contradicted social action because it has been widely adopted as a legal sanction but is also considered to be excessive enforcement. In the present study, we conducted a scenario-based experiment to examine the psychological process underlying the endorsement of ostracism in school settings. We focused on three general rationales to justify the sanction: a general prevention to protect public welfare (utilitarianism); a counter to deviance from social norms (retributivism); and a type of education to rehabilitate a perpetrator (moral education). The results showed that utilitarianism was more effective in justifying ostracism than retributivism or moral education. Further, preferences towards ostracism based in utilitarianism were less susceptible to influence from others. These findings indicate people’s general preference for the protection of public welfare over the segregation of wrongdoers.

DOI： 10.4992/jjpsy.90.17338

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Development of the Japanese version of the three-item loneliness scale. Reviewed

Igarashi T

BMC psychology Vol. 7 ( 1 ) page： 20 2019

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.1186/s40359-019-0285-0

Web of Science

PubMed
クラウドソーシングを利用したアンケートデータ収集のノウハウと課題

白木優馬, 五十嵐祐

デジタルプラクティス Vol. 9 ( 4 ) page： 874 - 885 2018.10

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Language：Japanese Publishing type：Research paper (scientific journal)

近年，クラウドソーシングを用いて，大規模なサンプルを対象としてアンケートを配布する研究が活発に行われている．本稿では，クラウドソーシングを用いたアンケートデータ収集のメリットについてまとめたのち，筆者らのこれまで実践において直面してきた課題について紹介する．さらに，データの信頼性の担保やワーカへの倫理的配慮といった具体的な課題への対応に関するノウハウとともに，クラウドソーシングの利用にともなう各種の注意点についても紹介する．

CiNii Books
Mortality salience and altruistic behavior : Focusing on group identity and group permeability

Furuhashi Kengo, Igarashi Tasuku

対人社会心理学研究 = Japanese journal of interpersonal and social psychology ( 18 ) page： 71 - 75 2018.3

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：大阪大学大学院人間科学研究科対人社会心理学研究室

Previous studies have shown that people high in group identity are likely to cooperate with other group members. This study examines if mortality salience increases altruism among those low in group identity in impermeable groups. Results showed that participants low in group identity in the mortality salience condition behaved altruistically when the group permeability was low. Thus, people low in group identity adopt the strategy of being more altruistic only if it is difficult to leave the group. This suggests that when the group is impermeable, people low in group identity have no option but to behave altruistically to justify their cultural world-view in the group due to the difficulty to moving to other group.

DOI： 10.18910/70543

CiNii Books

Other Link： http://hdl.handle.net/11094/70543
"Paying it forward" via satisfying a basic human need: The need for relatedness satisfaction mediates gratitude and prosocial behavior Reviewed

Yuma Shiraki, Tasuku Igarashi

ASIAN JOURNAL OF SOCIAL PSYCHOLOGY Vol. 21 ( 1-2 ) page： 107 - 113 2018

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Language：English Publishing type：Research paper (scientific journal) Publisher：WILEY

People who receive kindness tend to feel gratitude and act in a prosocial manner toward third persons (i.e., paying it forward). Combining the separate evidence that (a) gratitude leads to the formation of strong psychological bonds from a beneficiary to a benefactor and that (b) people become more prosocial toward strangers when the need for relatedness (NFR) is satisfied, two online experiments were conducted to examine if NFR satisfaction mediates the association between gratitude and prosocial behavior toward third persons. After evoking gratitude by recalling past experiences (Study 1) or writing a letter to someone (Study 2), participants were asked to make a donation from their remuneration for the experiment to a charity organization. As predicted, emotional manipulation promoted donation via feelings of gratitude and satisfied NFR. Implications of the current model for integrating previous findings are discussed.

DOI： 10.1111/ajsp.12211

Web of Science

Scopus
The effects of collectivism and others attitudes on assent to ostracism

Tamai Ryuichi, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 81 ( 0 ) page： 3B-009 - 3B-009 2017.9

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

DOI： 10.4992/pacjpa.81.0_3b-009

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We Can’t Return Evil for Good: The Comparison between Direct and Indirect Reciprocity Reviewed

Yuma Shiraki, Tasuku Igarashi

Letters on Evolutionary Behavioral Science Vol. 8 ( 1 ) page： 4-7 2017.2

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Human Behavior and Evolution Society of Japan

DOI： 10.5178/lebs.2017.54
Regulatory focus and preference for cooperation: Choices in Prisoner's Dilemma tasks

Sato Yuki, Igarashi Tasuku

Japanese Journal of Social Psychology Vol. 33 ( 2 ) page： 93 - 100 2017

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Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Society of Social Psychology

This study investigated the effect of a player's regulatory focus on his/her preference for cooperation and prosociality in a social dilemma situation. After the manipulation of regulatory focus, participants chose cooperation (remaining silent) or defection (betrayal) in simultaneous and sequential Prisoner's Dilemma (PD) tasks based on a traditional scenario of prison sentence rewards. Participants in the prevention focus condition showed more defection than did those in the promotion focus and the control conditions. In the sequential PD task, a greater number of participants in the prevention focus condition used an egoistic strategy (i.e., consistent defection) as the second movers than did those in the promotion focus and the control conditions, who tended to use a conditional cooperation strategy. These findings suggest that prevention-focused players show a less strong preference for cooperation and behave more selfishly when the pay-off matrix is loss-framed.

DOI： 10.14966/jssp.0947

Scopus

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Conceptions of happiness and life satisfaction: An exploratory study in 14 national groups Reviewed

Joshanloo, M., Rizwan, M., Khilji, I. A., Ferreira, M. C., Poon, W.-C., Sundaram, S., Ho, L. S., Yeung, V. W.-l., Han, G., Bae, J., Demir, M., Achoui, M., Pang, J. S., Jiang, D.-Y., Lamers, S. M. A., Turan, Y., Lepshokova, Z. K., Panyusheva, T., Natalia, A., Asano, R., Igarashi, T., & Tsukamoto, S.

Personality and Individual Differences Vol. 102 page： 145-148 2016.11

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1016/j.paid.2016.06.065
自己愛傾向と自尊心がゲームへの没入傾向に及ぼす影響 Reviewed

加藤仁, 五十嵐祐

心理学研究 Vol. 87 page： 1-11 2016.1

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.4992/jjpsy.87.14033
向社会的行動の受け手の感謝および負債感を喚起する要因の検討心理学研究 Reviewed

白木優馬, 五十嵐祐

心理学研究 Vol. 10 page： 29-36 2016

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 10.4992/jjpsy.87.15040
自己愛傾向と自尊心がゲームへの没入傾向に及ぼす影響 Reviewed

加藤仁,五十嵐祐

心理学研究 2015

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 00
精神的健康・幸福度をめぐる新たな二者関係理論とその実証方法 Reviewed

浅野良輔,五十嵐祐

心理学研究 2015

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 00
Improving medical and health decision-making through culture-sensitive health communication: An agenda for science and practice.

Betsch, C., Böhm, R., (remaining authors in alphabetical order) Airhihenbuwa, C., Butler, R., Chapman, G., Haase, N., Herrmann, B., Igarashi, T., Kitayama, S., Korn, L., Nurm, Ü-K., Rohrmann, B., Rothman, A., Shavitt, S., Updegraff, J. A., & Uskul, A.

Medical Decision Making 2015

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Language：English Publishing type：Research paper (scientific journal)

DOI： doi: 10.1177/0272989X15600434
日本版HEMA尺度の作成と検討――幸せへの動機づけとは―― Reviewed

浅野良輔,五十嵐祐,塚本早織

心理学研究 2014

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Language：Japanese Publishing type：Research paper (scientific journal)

DOI： 00
Cross-cultural validation of the fear of happiness scale across 14 national groups. Reviewed

Joshanloo, M., Lepshokova, Z., Panyusheva, T., Natalia, A., Poon, W., Yeung, V., Sundaram, S., Achoui, M., Asano, R., Igarashi, T., Tsukamoto, S., Rizwan, M., Khilji, I., Ferreira, M. C., Pang, J., Ho, L., Han, G., Bae, J., & Jiang, D.-Y.

Journal of Cross-Cultural Psychology 2014

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Language：English Publishing type：Research paper (scientific journal)

DOI： 10.1177/0022022113505357
Fragility of happiness beliefs across 15 national groups. Reviewed

Joshanloo, M., Weijers, D., Jiang, D.-Y., Han, G., Bae, J., Pang, J. S., Ho, L. S., Ferreira, M. C., Demir, M., Rizwan, M., Khilji, I. A., Achoui, M., Asano, R., Igarashi, T., Tsukamoto, S., Lamers, S. M. A., Turan, Y., Sundaram, S., Yeung, V. W. L., Poon, W.-C., Lepshokova, Z., Panyusheva, T., & Natalia, A.

Journal of Happiness Studies Vol. 15 page： 1-26 2014

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Language：English Publishing type：Research paper (scientific journal)

DOI： doi: 10.1007/s10902-014-9553-0
Text-Mining Analysis on Recognition of Loneliness in Relation to Delay Discounting, and Social Value Orientation

Vol. 9 ( 3 ) page： 17-25 2012.3

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Language：Japanese Publishing type：Research paper (scientific journal)
Perceived entitativity of social networks

Igarashi, T., & Kashima, Y.

Journal of Experimental Social Psychology Vol. 47 page： 1048-1058 2011.11

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Language：English Publishing type：Research paper (scientific journal)
An exploratory analysis of structural characteristics of Web sites

Vol. 9 ( 2 ) page： 23-34 2011.9

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Language：Japanese Publishing type：Research paper (scientific journal)
How social comparison processes of interpersonal environments affect subjective evaluation of rewards :Using a delay-discounting task

Vol. 8 ( 1 ) page： 11-17 2010.6

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Language：Japanese Publishing type：Research paper (scientific journal)
No mobile, no life: Self-perception and text-message dependency among Japanese high school students

Igarashi, T., Motoyoshi, T., Takai, J., & Yoshida, T.

Computers in Human Behavior Vol. 24 page： 2311-2324 2008.10

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Frontiers of psychological studies (2) Frontiers of studies on interpersonal psychology (6) Communication designated by person to person connection: interpersonal psychology of network

Vol. 49 ( 8 ) page： 530-540 2008.8

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Language：Japanese Publishing type：Research paper (scientific journal)
Culture, trust and social networks

Igarashi, T., Kashima, Y., Kashima, E. S., Farsides, T., Kim, U., Strack, F., Werth, L., & Yuki, M.

Asian Journal of Social Psychology Vol. 11 page： 88-101 2008.1

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Language：English Publishing type：Research paper (scientific journal)
Gender differences in social network development via mobile phone text messages: A longitudinal study

Igarashi, T., Takai, J., & Yoshida, T.

Journal of Social and Personal Relationships Vol. 22 page： 691-713 2005.10

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Language：English Publishing type：Research paper (scientific journal)
A conceptual framework of micro- and meso-level effects of computer-mediated communication on psychological well-being

Vol. 51 page： 145-162 2004.12

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Language：Japanese Publishing type：Research paper (scientific journal)
メディアコミュニケーションが心理的健康に与える影響 : 大学新入生の社会的ネットワークと孤独感を中心として

五十嵐祐

名古屋大学大学院教育発達科学研究科紀要. 心理発達科学 Vol. 50 page： 323-325 2003.12

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Language：Japanese Publishing type：Research paper (scientific journal)
Development of the Information-Exploration Scale and Its Relation to Undergraduates' Media Usage

Vol. 50 page： 285-292 2003.12

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Language：Japanese Publishing type：Research paper (scientific journal)
大学新入生の携帯メール利用が入学後の孤独感に与える影響

五十嵐祐, 吉田俊和

心理学研究 Vol. 74 ( 4 ) page： 379-385 2003.10

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Language：Japanese Publishing type：Research paper (scientific journal)
The effect of social skills on loneliness through mediation of CMC social networks

Vol. 17 ( 2 ) page： 97-108 2002.1

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Language：Japanese Publishing type：Research paper (scientific journal)
大学新入生の携帯メール利用が孤独感に及ぼす影響

五十嵐祐

心理発達科学論集 ( 31 ) page： 1-7 2001

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Books 11

Encyclopedia of mathemtatical sociology

（ Role： Contributor）

2022.8 （ ISBN:9784621306659 ）

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Total pages：xvi, 760p Language：Japanese

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心理臨床実践のための心理学 (心の専門家養成講座5)

五十嵐祐（ Role： Contributor , 社会的存在としての人間）

ナカニシヤ出版 2021.4 （ ISBN:4779515599 ）

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Total pages：144 Language：Japanese

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ASIN
こころの危機への心理学的アプローチ―個人・コミュニティ・社会の観点から

五十嵐祐（ Role： Contributor , テロによる心理的危機―テロ対策と社会的ネットワーク―）

金剛出版 2019.6 （ ISBN:4772417028 ）

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Total pages：220 Language：Japanese

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ASIN
（翻訳）社会的ネットワークを理解する

五十嵐祐, 佐藤有紀, 加藤仁, 古谷嘉一郎, 西村太志, 竹村幸祐, 竹中一平, 平島太郎, 石黒格, 浅野良輔（ Role： Supervisor (editorial)）

北大路書房 2015 （ ISBN:4762829005 ）

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Language：Japanese

Other Link： https://www.amazon.co.jp/%E7%A4%BE%E4%BC%9A%E7%9A%84%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF%E3%82%92%E7%90%86%E8%A7%A3%E3%81%99%E3%82%8B-%E3%83%81%E3%83%A3%E3%83%BC%E3%83%AB%E3%82%BA-%E3%82%AB%E3%83%89%E3%82%A5%E3%82%B7%E3%83%B3/dp/4762829005
Exponential Random Graph Models for Social Networks: Theories, Methods and Applications

Dean Lusher, Johan Koskinen, Garry Robins（ Role： Joint author）

2012.11 （ ISBN:9780521141383 ）

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Language：English
対人関係の社会心理学

吉田俊和・橋本剛・小川一美（ Role： Joint author）

ナカニシヤ出版 2012.10 （ ISBN:477950693X ）

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Language：Japanese
幸福を目指す対人社会心理学

大坊郁夫（ Role： Joint author）

ナカニシヤ出版 2012.2 （ ISBN:978-4-7795-0445-7 ）

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Language：Japanese
体験で学ぶ社会心理学

吉田俊和・元吉忠寛（ Role： Joint author）

ナカニシヤ出版 2010.4 （ ISBN:4779504627 ）

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Language：Japanese
健康とくらしに役立つ心理学

金政祐司・大竹恵子（ Role： Joint author）

北樹出版 2009.3 （ ISBN:477930170X ）

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Language：Japanese
社会心理学事典

日本社会心理学会（ Role： Joint author）

丸善 2009.3 （ ISBN:4621081071 ）

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Language：Japanese
インターネット心理学のフロンティア

三浦麻子・森尾博昭・川浦康至（ Role： Joint author）

誠信書房 2009.2 （ ISBN:4414301696 ）

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MISC 2

SNSにみる「ウチ」と「ソト」 Invited

五十嵐祐

学鐙 Vol. 117 ( 1 ) 2020.3

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Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)
機械仕掛けのトルコ人, 人間仕掛けのクラウドソーシング Invited

五十嵐祐

心理学ワールド Vol. 82 page： 23 - 24 2018.7

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Presentations 68

社会考慮がもたらすソーシャルメディアの第三者効果

五十嵐　祐

日本社会心理学会第53回大会

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Event date： 2012.11

Language：Japanese
社会考慮と社会参加：一般的信頼、橋渡し型・結束型社会関係資本との関連から

五十嵐　祐

日本心理学会第76回大会発表論文集

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Event date： 2012.9

Language：Japanese
Current directions of social psychology research in Japan: focusing on the interpersonal viewpoints

五十嵐　祐

AASP/JGDA/JSSP Joint Symposium presented at the 59th Annual Meeting of the Japanese Group Dynamics Association, Kyoto University

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Event date： 2012.9

Language：English
互恵性の信念が社会的ネットワークの学習課題の成績に及ぼす影響

五十嵐　祐

日本グループ・ダイナミックス学会第59回大会発表論文集

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Event date： 2012.9

Language：Japanese
Bridging social networks foster youth’s voting through an increase in social consideration International conference

五十嵐　祐

Poster session presented at the 24th Annual Convention of the Association for Psychological Science, Chicago, IL.

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Event date： 2012.5

Language：English
集団成員から見た集団の再帰性：社会的ネットワーク分析によるアプローチ

五十嵐祐

日本社会心理学会第52回大会シンポジウム

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Event date： 2011.9

Language：Japanese
誤った二分法への気づきとメディアの第三者効果：マスメディア・ソーシャルメディアにおける検討

五十嵐祐

日本心理学会第75回大会発表論文集

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Event date： 2011.9

Language：Japanese
ソーシャルメディアはデマの信憑性評価を抑制するか：孤独感との関連に基づく検討

五十嵐祐

日本社会心理学会第52回大会発表論文集

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Event date： 2011.9

Language：Japanese
東日本大震災発生後のソーシャルメディア上のコミュニケーション：Twitterのリツイート（RT）ネットワークに関する探索的分析

五十嵐祐

日本グループ・ダイナミックス学会第58回大会発表論文集

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Event date： 2011.8

Language：Japanese
行為者志向型ネットワーク選択モデルによる社会的ネットワークのダイナミックスの検討

五十嵐祐

第3回CERSS若手スピーカーシリーズ（北海道大学社会科学実験研究センター）

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Event date： 2011.7

Language：Japanese
A social network approach to reducing loneliness based on relational models theory. International conference

Igarashi, T.

Poster session presented at the 12th European Congress of Psychology, Istanbul, Turkey.

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Event date： 2011.7

Language：English
解釈レベルが大学生活不安に関する他者態度の推定に与える影響

五十嵐祐

日本教育心理学会第53回総会発表論文集

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Event date： 2011.7

Language：Japanese
対人環境の社会的比較が遅延割引に及ぼす影響

五十嵐祐

日本心理学会第74回大会発表論文集

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Event date： 2010.9

Language：Japanese
孤独感が引き起こす遅延割引と社会的ネットワークの緩衝効果

五十嵐祐

日本社会心理学会第51回大会発表論文集

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Event date： 2010.9

Language：Japanese
高信頼者の対人関係選択のダイナミックス：行為者指向型ネットワーク選択モデルによる「見極め」能力の検討

五十嵐祐

日本グループ・ダイナミックス学会第57回大会発表論文集

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Event date： 2010.8

Language：Japanese
Loneliness and impulsivity in delay discounting. International conference

Igarashi, T.

Paper presented at the 27th International Congress of Applied Psychology, Melbourne, Australia.

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Event date： 2010.7

Language：English
社会的ネットワークの不均衡と規範意識のズレが関係満足感に与える影響：階層線型モデルによるグループデータの縦断的分析

五十嵐祐

日本社会心理学会第50回大会・日本グループ・ダイナミックス学会第56回大会合同大会発表論文集

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Event date： 2009.9

Language：Japanese
社会的ネットワークと信頼：文化間比較による検討

五十嵐祐

日本心理学会第73回大会ワークショップ

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Event date： 2009.8

Language：Japanese
関係葛藤がもたらす社会的ネットワーク構造の集中化―グループワークにおける縦断的検討―

五十嵐祐

日本心理学会第73回大会発表論文集

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Event date： 2009.8

Language：Japanese
Network centralization and perception of relationship conflict in groups: A longitudinal study. International conference

Igarashi, T.

Paper presented at the 29th International Sunbelt Social Network Conference, San Diego, CA.

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Event date： 2009.3

Language：English
Trust and social networks in the East and the West. International conference

Igarashi, T., Kashima, Y., Kashima, E. S., Farsides, T., Kim, U., Strack, F., Werth, L., & Yuki, M.

Poster session presented at the ninth annual meeting of the Society for Personality and Social Psychology, Tampa, FL

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Event date： 2009.2

Language：English
How to publish your research.

五十嵐祐

対人社会心理学研究室第43回Brown Bag研究会（大阪大学大学院人間科学研究科）

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Event date： 2008.11

Language：Japanese
グループワークにおける集団内信頼の醸成プロセス：集団アイデンティティ、一般的信頼との関連から

五十嵐祐

日本社会心理学会第49回大会発表論文集

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Event date： 2008.11

Language：Japanese
インターネット心理学のフロンティア：デジタル化で変貌する個人・人間関係・社会

五十嵐祐

日本社会心理学会第49回大会ワークショップ

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Event date： 2008.11

Language：Japanese
グループワークにおける集団内信頼の縦断的変化－初期態度としての規範意識と一般的信頼の影響－

五十嵐祐

日本心理学会第72回大会発表論文集

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Event date： 2008.9

Language：Japanese
Trust does matter in social networks: A longitudinal study. International conference

五十嵐祐

Paper presented at the 29th International Congress of Psychology, Berlin, Germany.

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Event date： 2008.7

Language：English
社会的交換ネットワークのミクロ構造と資源の利益効率性：力学系モデルとシミュレーションによる分析

清水裕士・五十嵐祐

日本グループ・ダイナミックス学会第55回大会発表論文集

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Event date： 2008.6

Language：Japanese
関係葛藤の低減に及ぼす初期態度としての一般的信頼、規範意識の影響

五十嵐祐・小川一美・斎藤和志

日本グループ・ダイナミックス学会第55回大会発表論文集

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Event date： 2008.6

Language：Japanese
社会的ネットワークの実体性知覚

五十嵐祐

第345回関西社会心理学研究会（大阪大学大学院人間科学研究科）

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Event date： 2008.2

Language：Japanese
Perceived entitativity and patterns of interaction in small and large social networks. International conference

五十嵐祐

Poster session presented at the ninth annual meeting of the Society for Personality and Social Psychology, Albuquerque, NM.

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Event date： 2008.2

Language：English
Entitativity of social networks. International conference

五十嵐祐

Brownbag Seminar, Department of Psychology, University of Southern California, CA.

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Event date： 2008.2

Language：English
社会的ネットワークの知覚された実体性

五十嵐祐・嘉志摩佳久

日本社会心理学会第48回大会発表論文集

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Event date： 2007.9

Language：Japanese
Perception of group entitativity in social networks. International conference

Igarashi, T., & Kashima, Y.

Paper presented at the seventh biennial conference of the Asian Association of Social Psychology, Sabah, Malaysia

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Event date： 2007.7

Language：English
メディアコミュニケーションと社会的ネットワークの変容：社会関係資本論によるアプローチ

五十嵐祐

日本グループ・ダイナミックス学会第54回大会小講演

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Event date： 2007.6

Language：Japanese
Culture, trust and social networks.

Igarashi, T., Kashima, Y., Kashima, E. S., Farsides, T., Kim, U., Strack, F., Werth, L., & Yuki, M.

Paper presented at the 54th Annual meetings of the Japanese Group Dynamics Association, Nagoya, Japan

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Event date： 2007.6

Language：English
Dynamics of social networks, trust, and social identity. International conference

Igarashi, T., Robins, G., & Pattison, P.

Paper presented at the 27th International Sunbelt Social Network Conference, Corfu, Greece

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Event date： 2007.5

Language：English
Entitativity of social networks. International conference

五十嵐祐

Brownbag Seminar, Department of Psychology, University of Illinois at Urbana-Champaign, IL.

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Event date： 2007.2

Language：English
Entitativity of social networks. International conference

Igarashi, T., & Kashima, Y.

Poster session presented at the eighth conference of the Society for Personality and Social Psychology, Memphis, TN.

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Event date： 2007.1

Language：English
社会的ネットワークの変容過程に関する縦断的検討―Exponential Random Graph (p*) Modelによるアプローチ―

五十嵐祐

第14回対人社会心理学フォーラム（大阪大学大学院人間科学研究科）

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Event date： 2006.11

Language：Japanese
Text-message communication addiction among Japanese high school students: Somatic symptoms and self-perception of addictive behavior. International conference

Igarashi, T., Motoyoshi, T., Takai, J., & Yoshida, T.

Paper presented at the 92nd Annual Convention of the National Communication Association, San Antonio, TX.

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Event date： 2006.11

Language：English
社会的ネットワーク構造の縦断的変化：p*モデルによる検討

五十嵐祐

日本社会心理学会第47回大会発表論文集

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Event date： 2006.9

Language：Japanese
社会的ネットワークの変容過程に関する縦断的検討―Exponential Random Graph (p*) Modelによるアプローチ―

五十嵐祐

名古屋社会心理学研究会（名古屋大学大学院教育発達科学研究科）

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Event date： 2006.7

Language：Japanese
携帯メール依存に関する研究（3）―認知―行動モデルに基づく検討―

五十嵐祐・元吉忠寛・高井次郎・吉田俊和

日本グループ・ダイナミックス学会第53回大会発表論文集

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Event date： 2006.5

Language：Japanese
Longitudinal changes in friendship networks: an approach from exponential random graph models. International conference

Igarashi, T., Robins, G., & Pattison, P.

Paper presented at the International Conference on Network Science, Bloomington, IN.

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Event date： 2006.5

Language：English
Reciprocity of cross- and same-sex relationships in face-to-face and text message-mediated networks. International conference

Igarashi, T., Robins, G., Pattison, P., & Wang, P.

Paper presented at the 26th International Sunbelt Social Network Conference, Vancouver, Canada

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Event date： 2006.4

Language：English
Culture, trust and social networks. International conference

五十嵐祐

Melbourne Social Psychology Meeting, Melbourne, Australia.

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Event date： 2006.3

Language：English
Social selection processes in face-to-face and text message-mediated social networks: A structural approach. International conference

Igarashi, T., Yoshida, T., Robins, G., & Wang, P.

Poster session presented at the seventh conference of the Society for Personality and Social Psychology, Palm Springs, CA.

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Event date： 2006.1

Language：English
Culture, trust and social networks. International conference

五十嵐祐

Social Network Analysis Colloquium, Melbourne, Australia

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Event date： 2005.10

Language：English
The text messaging addiction scale: Factor structure, reliability, and validity. International conference

Igarashi, T., Motoyoshi, T., Takai, J., & Yoshida, T.

Paper presented at the sixth biennial conference of the Asian Association of Social Psychology, Wellington, New Zealand

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Event date： 2005.4

Language：English
Structural interaction between face-to-face and mobile phone text message-mediated social networks. International conference

Igarashi, T. & Yoshida, T.

Paper presented at the sixth biennial conference of the Asian Association of Social Psychology, Wellington, New Zealand

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Event date： 2005.4

Language：English
携帯メール依存に関する研究（2）―携帯メール依存と利用実態―

元吉忠寛・五十嵐祐・高井次郎・吉田俊和

日本グループ・ダイナミックス学会第52回大会発表論文集

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Event date： 2005.3

Language：Japanese
携帯メール依存に関する研究（1）―携帯メール依存尺度の作成―

五十嵐祐・元吉忠寛・高井次郎・吉田俊和

日本グループ・ダイナミックス学会第52回大会発表論文集

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Event date： 2005.3

Language：Japanese
対面および携帯メールの社会的ネットワークの相互影響過程－統計的社会的ネットワークモデルを用いた検討－

五十嵐祐・吉田俊和

日本社会心理学会第45回大会発表論文集

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Event date： 2004.9

Language：Japanese
Response styles of mobile phone text messages: Effects of gender and message contents. International conference

Igarashi, T.

Poster session presented at the 28th International Congress of Psychology, Beijing, China

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Event date： 2004.8

Language：English
メディアコミュニケーションの心理的影響

五十嵐祐

名古屋社会心理学研究会（名古屋大学大学院教育発達科学研究科）

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Event date： 2004.5

Language：Japanese
高校新入生の適応プロセスに関する縦断的研究―初期適応と中・長期適応の差異を中心として－

五十嵐祐・徳谷智美

東海心理学会第53回大会発表論文集

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Event date： 2004.5

Language：Japanese
拒否回避欲求と親密度が携帯メールの返信スタイルに与える影響

五十嵐祐・吉田俊和

日本グループ・ダイナミックス学会第51回大会発表論文集

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Event date： 2004.5

Language：Japanese
The impact of face-to-face and mobile phone text message communication on social network development: Longitudinal changes in network size and intimacy. International conference

Igarashi. T. & Yoshida, T.

Poster session presented at the fifth conference of the Society for Personality and Social Psychology, Austin, TX.

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Event date： 2004.1

Language：English
携帯メールの利用が社会的ネットワーク構造に与える影響：男女差を中心とした縦断的検討

五十嵐祐・吉田俊和

日本社会心理学会第44回大会発表論文集

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Event date： 2003.9

Language：Japanese
Longitudinal changes in social network structure of face-to-face and mobile phone text messages: Focusing on gender differences. International conference

Igarashi, T.

Poster session presented at the fifth biennial conference of the Asian Association of Social Psychology, Manila, Phillippines

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Event date： 2003.7

Language：English
携帯メールの社会的ネットワークの有無が孤独感に与える影響―大学新入生を対象として―

五十嵐祐・吉田俊和

日本グループ・ダイナミックス学会第50回大会発表論文集

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Event date： 2003.3

Language：Japanese
大学新入生の携帯メール利用が入学後の孤独感に与える影響

五十嵐祐・吉田俊和

日本社会心理学会第43回大会発表論文集

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Event date： 2002.9

Language：Japanese
CMCの社会的ネットワークを介した社会的スキルと孤独感との関連性

五十嵐祐

日本社会心理学会第42回大会発表論文集

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Event date： 2001.9

Language：Japanese
コロナで変わったこと、変わらないこと：人間関係はどのように作られるのか？～人間のこころと社会環境のダイナミクス～ Invited

五十嵐,祐

あいちサイエンスフェスティバル2021（人づきあいのミライを考える～コロナによって変わるコミュニケーション、相手も自分も大切にする力～） 2021.10.30 名古屋大学学術研究・産学官連携推進本部

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Language：English Presentation type：Public lecture, seminar, tutorial, course, or other speech
Community multiplexity and task switching Invited

Tasuku Igarashi

Seminar at the Center for Transformative Innovation, Swinburne University of Technology 2020.2.26

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Language：English Presentation type：Public lecture, seminar, tutorial, course, or other speech
社会的ネットワークの形成過程を理解する

五十嵐祐

高知工科大学セミナー 2019.10.8

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Language：Japanese
Overchoosing: A mechanism of tie formation in social networks

Tasuku Igarashi

Social Network Seminar at School of Psychological Science, The University of Melbourne 2020.7.3

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Language：English Presentation type：Public lecture, seminar, tutorial, course, or other speech
Generalize trust and social selection processes International conference

Tasuku Igarashi

MelNet Research Seminar 2019.6.19

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Language：English Presentation type：Public lecture, seminar, tutorial, course, or other speech

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To the head of Presentations.▲

KAKENHI (Grants-in-Aid for Scientific Research) 8

Understanting the recursive construction process of isolation and loneliness in the New Normal

Grant number：21H00930 2021.4 - 2025.3

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

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Authorship：Principal investigator

Grant amount：\17160000 （ Direct Cost: \13200000 、 Indirect Cost：\3960000 ）
Development and Validation of Social Networking Principles for Mitigating Echo Chambers

Grant number：19H04217 2019.4 - 2023.3

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B) Grant-in-Aid for Scientific Research (B)

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Authorship：Coinvestigator(s)
実行機能と「開かれた」社会的ネットワークの戦略的な形成：バーチャルラボでの検討

Grant number：17KK0066 2018 - 2020

日本学術振興会科学研究費助成事業国際共同研究加速基金(国際共同研究強化) 国際共同研究加速基金(国際共同研究強化)

五十嵐祐

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Authorship：Principal investigator

Grant amount：\14040000 （ Direct Cost: \10800000 、 Indirect Cost：\3240000 ）

年度末の渡航ということもあり、今年度においては共同研究者とのミーティングを行い、今後の研究計画と遂行方針を確認するにとどまった。オーストラリアおよび日本でのデータ収集については、それぞれの大学のスケジュールを参照しながら、研究代表者が適宜日本に帰国してセットアップを行い、今年度中に両国でデータ収集を行う方針を固めた。また、実行機能を含む広範な認知機能が複数コミュニティへの所属に果たす役割についてのレビューを行った。
Executive function and the strategic formation of "open" social networks

Grant number：17K04314 2017.4 - 2021.3

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C) Grant-in-Aid for Scientific Research (C)

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Authorship：Principal investigator

Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）
日本語テキスト解析のための感情辞書標準版の作成と公開：ビッグデータ時代の心理分析に向けて

2017.4 - 2018.3

電気通信普及財団研究調査助成

五十嵐祐, 笹原和俊

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Authorship：Principal investigator
SNS における「つながり」のリスク：社会的ネットワーク理論に基づく実験的検討

2016.4 - 2017.3

電気通信普及財団研究調査助成

加藤仁, 五十嵐祐

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Authorship：Coinvestigator(s)
Implicit attitudes and social isolation

Grant number：25780371 2013.4 - 2017.3

Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B) Grant-in-Aid for Young Scientists (B)

Igarashi Tasuku

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Authorship：Principal investigator

Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）

This longitudinal research investigated the process of social isolation in a social network in relation to maladaptive interpersonal reactions driven by negative implicit self-esteem. The data were collected from first-year undergraduates four times in a year. Analysis based on the stochastic actor-oriented model revealed that, under controlling for structural effects on relationship formation, high implicit self-esteem inhibited the expansion of social networks for information-seeking, and explicit self-esteem was positively associated with implicit self-esteem over time. The result implies that negative implicit self-esteem does not cause exclusion from others, but rather increase inactivity in relationship construction; and interventions to explicit self-esteem may be effective to the recovery of negative implicit self-esteem.
潜在的態度がもたらす社会的ネットワークからの孤立過程の解明

2013 - 2017

文部科学省科学研究費補助金（若手研究(B)）

五十嵐祐

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Authorship：Principal investigator Grant type：Competitive

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To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲

Teaching Experience (Off-campus) 13

調査法

（Nagoya University）
社会行動学講義

（Nagoya University）
社会行動学演習

（Nagoya University）
社会心理学研究

（Nagoya University）
社会心理学

（Tezukayama University）
発達と学習

（Hokkaido University of Education）
流行と消費行動の心理学

（Sapporo University）
教育と発達の科学

（Nagoya University）
心理行動科学概論

（Hokkai-Gakuen University）
心理行動科学実験演習

（Hokkai-Gakuen University）
心理学

（Nagoya University）
対人行動学

（Tezukayama University）
基礎実験法

（Nagoya University）

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To the head of Teaching Experience (Off-campus).▲