Faculty Profiles - IGARASHI Tasuku

Ninety years after Lewin: The role of familism and attachment style in social networks characteristics across 21 nations/areas

PubMed

S22C-5　日本における不審者の外見的特徴と言動

佐名龍太, 五十嵐祐

日本行動計量学会大会抄録集 Vol. 52 ( 0 ) page： 72 - 73 2024.9

Xian Zhao, Omri Gillath, Itziar Alonso-Arbiol, Amina Abubakar, Byron G. Adams, Frédérique Autin, Audrey Brassard, Rodrigo J. Carcedo, Or Catz, Cecilia Cheng, Tamlin S. Conner, Tasuku Igarashi, Konstantinos Kafetsios, Shanmukh Kamble, Gery Karantzas, Rafael Emilio Mendía-Monterroso, João M. Moreira, Tobias Nolte, Willibald Ruch, Sandra Sebre, Angela Suryani, Semira Tagliabue, Qi Xu, Fang Zhang

Journal of Social and Personal Relationships Vol. 41 ( 8 ) page： 2251 - 2275 2024.8

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

Drawing on the literature on person-culture fit, we investigated how culture (assessed as national-level familism), personality (tapped by attachment styles) and their interactions predicted social network characteristics in 21 nations/areas (N = 2977). Multilevel mixed modeling showed that familism predicted smaller network size but greater density, tie strength, and multiplexity. Attachment avoidance predicted smaller network size, and lower density, tie strength, and multiplexity. Attachment anxiety was related to lower density and tie strength. Familism enhanced avoidance’s association with network size and reduced its association with density, tie strength, and multiplexity. Familism also enhanced anxiety’s association with network size, tie strength, and multiplexity. These findings contribute to theory building on attachment and culture, highlight the significance of culture by personality interaction for the understanding of social networks, and call attention to the importance of sampling multiple countries.

DOI： 10.1177/02654075241237939

Unequal but not separate: Emergence of rich–poor cooperation in resource exchange Reviewed

精神疾患に対するパブリックスティグマの軽減方略

原田慎也, 五十嵐祐

日本健康心理学会大会発表論文集 Vol. 36 ( 0 ) page： 54 2023.12

Jiayu Chen, Tasuku Igarashi

Asian Journal of Social Psychology Vol. 26 ( 4 ) page： 431 - 444 2023.12

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

Addressing inequality is a critical challenge for society as a whole and requires sustained efforts to promote fairness and opportunity for all. Filling in the resource gap across social classes is essential in reducing inequality. Previous studies have revealed that ingroup favouritism hinders the rich from cooperating with the poor and expands the wealth gap. Nevertheless, how to find ways of narrowing the gap between the rich and the poor remains an open question. Inducing rich–poor cooperation could be effective in eliciting resource flow across classes. In this study, two experiments using a modified Prisoner's Dilemma game were conducted in Japan (N = 213) and China (N = 150) to examine whether highlighting partners' cooperativeness under permeable group boundaries induces rich–poor cooperation. All participants were allocated to the rich group and participated in the game with programmed rich- or poor-group partner bots, whose cooperation rates were manipulated. Despite the initial resource disparities between participants and the partner bots, participants were more likely to select and cooperate with cooperative poor-group partners than with non-cooperative rich-group partners. Generalized trust played an important role in the enhancement of rich–poor cooperation. The findings shed light on the possibility of reducing inequality and promoting social mobility in society.

DOI： 10.1111/ajsp.12569

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 Vol. 42 ( 21 ) page： 17670 - 17681 2023.7

Implementing Petty Favor in Facilitating Rich-Poor Resource Exchange Reviewed

Jiayu Chen, Tasuku Igarashi

Letters on Evolutionary Behavioral Science Vol. 14 ( 1 ) page： 1 - 7 2023.2

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

Humans seek to select and exchange resources with wealthy partners for greater benefits. In this study, we examined whether implementing the “petty favor” option (giving a small amount of resources to interaction partners prior to resource provision to pooled accounts) from rich to cooperative poor group members facilitates rich-poor selection and cooperation. In total, 216 participants were allocated to the rich group and played a repeated two-person public goods game with selfish rich or cooperative poor partner bots. Participants preferred to use the “petty favor” options on cooperative poor partners and contribute a large amount of resources toward public good. The findings suggest that the provision of petty favors motivates providers to exchange more resources with cooperators beyond the existing rich-poor boundary.

DOI： 10.5178/lebs.2023.100

コミュニティー・シェッドを活用した高齢者の社会的孤立・孤独の一次予防　シチズンサポートプロジェクトにおける心理学・脳科学のあり方

伊藤文人, 五十嵐祐, 松尾崇史, 髙島理沙, 鈴木真介, 橋本剛

日本心理学会大会発表論文集 Vol. 87 ( 0 ) page： SS-041 - SS-041 2023

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

社会的孤立・孤独は，さまざまな疾患のリスク因子となっており，孤立・孤独を生まない体制や社会の構築は喫緊の課題と言えます。しかし，高齢者が集う地域の場で男性が少ないことが，長年全国共通の課題となっています。こうした背景に基づき，2022年からJST-RISTEX SOLVE for SDGs 社会的孤立枠（総括：浦光博教授）の助成を受け，「シチズンサポートプロジェクトによる社会的孤立・孤独の一次予防」がスタートしました。このプロジェクトは，高齢者向けの新たな居場所「コミュニティー・シェッド（メンズ・シェッド）」の運営を行いながら，その効果を検証していきます。このコミュニティー・シェッドは，地域住民が自ら立ち上げ・運営を行い，仲間たちとともに木工など自分たちの興味のある活動を自由に行うことができる居場所で，海外ではメンズ・シェッドと呼ばれます。世界ではすでにその効果が広く認められている一方，具体的にどのような効果があるかについての科学的なエビデンスは限られています。心理学や脳科学は孤立・孤独の予防にどのように活かすことができるのか，これまでのプロジェクトの活動を踏まえて，議論できればと思います。

DOI： 10.4992/pacjpa.87.0_ss-041

Altruism in individual’s information sharing about COVID-19 Vaccines

Chen Jiayu, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 87 ( 0 ) page： 3C-002-PC - 3C-002-PC 2023

Loneliness and social daydreaming (2) Crowdsourcing samples

Igarashi Tasuku, Mitsunaga Haruhiko, Hirashima Taro, Yoshida Takuya

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 87 ( 0 ) page： 2A-020-PC - 2A-020-PC 2023

Aspects of Criminal Stereotypes in Japan. Examination of Stereotype Differences by Type of Crime.

Same Ryuta, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 87 ( 0 ) page： 1B-054-PE - 1B-054-PE 2023

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

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

Language：English 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

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

Language：English 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

Processes of Social Influence on Sampling Behavior: The Effect of Other's Positive Attitude and Receiver's Prior Experience

PubMed

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

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

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

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

Help-seeking in getting a new job

Furuhashi Kengo, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 86 ( 0 ) page： 3AM-086-PQ - 3AM-086-PQ 2022

Effects of the first person perspective on moral judgement on SNS posting

Kato Jin, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 86 ( 0 ) page： 1EV-012-PC - 1EV-012-PC 2022

Social comparison and perceived social mobility in cross-status impression formation

Chen Jiayu, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 86 ( 0 ) page： 1EV-025-PC - 1EV-025-PC 2022

A preliminary study on the relationships between mentalizing and social network size

Hirashima Taro, Igarashi Tasuku

The Proceedings of the Annual Convention of the Japanese Psychological Association Vol. 86 ( 0 ) page： 4AM-012-PC - 4AM-012-PC 2022

社会心理学から「孤独」にアプローチする

五十嵐祐

臨床心理学 Vol. 22 page： 218 - 222 2022

社会心理学から「孤独」にアプローチする

五十嵐祐

臨床心理学 Vol. 22 page： 218 - 222 2022

Generalized trust and social selection process Reviewed

Tasuku Igarashi, Taro Hirashima

Frontiers in Communication Vol. 6 2021.5

Authorship：Lead author,　Corresponding author Language：English 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

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

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

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

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

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

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

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

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

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

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

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

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

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

「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

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

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

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

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

“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

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

Motivations and Behaviors for Ensuring Privacy on Twitter

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

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

SAWADA Gota, IGARASHI Tasuku

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

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

The Hedonic and Eudaimonic Motives for Activities: Measurement Invariance and Psychometric Properties in an Adult Japanese Sample Reviewed

Overchoosing: A Mechanism of Tie-Formation in Social Networks

Tasuku Igarashi, Johank Koskinen

PsyArXiv 2020.6

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

Ryosuke Asano, Tasuku Igarashi, Saori Tsukamoto

Frontiers in Psychology Vol. 11 page： 1220 2020.6

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

Loneliness and the recursive formation of social environments

Igarashi Tasuku

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

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

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

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

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

Furuhashi, K., Igarashi, T.

Research in Social Psychology Vol. 36 ( 2 ) page： 39 - 48 2020

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

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

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

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

Approval of ostracism as a legal sanction: The justification effect of utilitarian rationale,刑罰としての排斥の容認―功利主義的な根拠の正当化効果― Reviewed

Tamai, R., Igarashi, T.

Shinrigaku Kenkyu Vol. 90 ( 2 ) page： 187 - 193 2019.6

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

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

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

Igarashi, T.

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

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

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

"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 2018.3

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

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

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

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

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

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

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

CiNii Books