研究者詳細 - 五十嵐　祐

論文 - 五十嵐　祐

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

Taro Hirashima, Tasuku Igarashi

Letters on Evolutionary Behavioral Science 13 巻 ( 2 ) 頁： 50 - 56 2022年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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

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Does Mental Simulation Decrease the Empathy Gap in Help-Seeking? 査読有り

Furuhashi, K; Igarashi, T

JAPANESE PSYCHOLOGICAL RESEARCH 67 巻 ( 1 ) 頁： 107 - 116 2022年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Japanese Psychological Research

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

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Development of the Japanese Version of the Linguistic Inquiry and Word Count Dictionary 2015 査読有り Open Access

Igarashi, T; Okuda, S; Sasahara, K

FRONTIERS IN PSYCHOLOGY 13 巻頁： 841534 2022年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Frontiers in Psychology

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.

DOI： 10.3389/fpsyg.2022.841534

援助要請における援助者選択に関する研究と展望 Open Access

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 68 巻頁： 17 - 25 2022年3月

社会心理学から「孤独」にアプローチする招待有り

五十嵐祐

臨床心理学 22 巻頁： 218 - 222 2022年3月

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

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

JAPANESE PSYCHOLOGICAL RESEARCH 64 巻 ( 1 ) 頁： 64 - 72 2022年1月

転職活動における援助要請行動 Open Access

古橋健悟, 五十嵐祐

日本心理学会大会発表論文集 86 巻 ( 0 ) 頁： 3AM-086-PQ - 3AM-086-PQ 2022年

自己視点がSNS投稿における道徳的判断に及ぼす影響 Open Access

加藤仁, 五十嵐祐

日本心理学会大会発表論文集 86 巻 ( 0 ) 頁： 1EV-012-PC - 1EV-012-PC 2022年

社会的比較と知覚される社会移動が階層間の印象形成に与える影響 Open Access

陳佳玉, 五十嵐祐

日本心理学会大会発表論文集 86 巻 ( 0 ) 頁： 1EV-025-PC - 1EV-025-PC 2022年

メンタライジングと社会的ネットワークサイズの関連 Open Access

平島太郎, 五十嵐祐

日本心理学会大会発表論文集 86 巻 ( 0 ) 頁： 4AM-012-PC - 4AM-012-PC 2022年

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 22 巻頁： 218 - 222 2022年

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 22 巻頁： 218 - 222 2022年

Generalized Trust and Social Selection Process 査読有り Open Access

Igarashi, T; Hirashima, T

FRONTIERS IN COMMUNICATION 6 巻 2021年5月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Frontiers in Communication

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 51 巻 ( 2 ) 頁： 213 - 221 2021年3月

Psychometric properties of measures of hedonic and eudaimonic orientations in Japan: The HEMA scale 査読有り

Asano, R; Tsukamoto, S; Igarashi, T; Huta, V

CURRENT PSYCHOLOGY 40 巻 ( 1 ) 頁： 390 - 401 2021年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Current Psychology

The Hedonic and Eudaimonic Motives for Activities (HEMA) scale measures well-being as a series of orientations. We investigated the HEMA scale’s psychometric properties among two Japanese samples in longitudinal studies over periods of one month (N = 385) and two months (N = 224). Exploratory and confirmatory factor analyses identified three subscales of the HEMA scale: hedonic pleasure orientation, hedonic relaxation orientation, and eudaimonic orientation. On average, at a given point in time, the correlations between subscales were r =.58 for the hedonic pleasure and hedonic relaxation orientations; r =.56 for the hedonic pleasure and eudaimonic orientations; and r =.26 for the hedonic relaxation and eudaimonic orientations—while the internal consistencies were αs >.80 for all subscales. In both studies, the three HEMA subscales had test-retest correlations averaging rs =.51, which suggests that these orientations are temporally quite stable, yet they are also amenable to change. Longitudinal analyses showed correlations between the HEMA scale and external criteria: hedonic pleasure orientation was associated with life satisfaction, positive affect, personal growth, purpose in life, and sense of meaning; hedonic relaxation orientation was associated with life satisfaction, positive affect, calm affect, and personal growth; and eudaimonic orientation was associated with life satisfaction, positive affect, personal growth, purpose in life, and sense of meaning. Implications for future research on the HEMA scale are discussed.

DOI： 10.1007/s12144-018-9954-z

Web of Science

Scopus

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その他リンク： 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 査読有り

Tamai, R, Igarashi, T

European Journal of Social Psychology 2021年

Processes of social influence on sampling behavior: The effect of other’s positive attitude and receiver’s prior experience 査読有り Open Access

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

Japanese Psychological Research 2021年

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・妥当性の検討査読有り Open Access

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年

テキストマイニングによるコロナ禍の消費者心理・行動の定量化 Open Access

笹原和俊, 奥田慎平, 五十嵐祐

人工知能学会全国大会論文集 JSAI2021 巻 ( 0 ) 頁： 1D3OS3b04 - 1D3OS3b04 2021年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人人工知能学会

<p>ソーシャルメディアでは日々、リアルタイムで様々な情報が投稿・共有され、中には新型コロナウイルス感染症拡大の影響と消費者生活に関する投稿も少なくない。そのような消費者の自発的な「生の声」（テキスト）には、コロナ禍における消費者心理・行動を定量的に理解するためのシグナルが潜在している。本研究では、コロナ禍における転売現象を対象として、Twitterの大規模ソーシャルデータから消費者心理・行動を定量化し、そこから洞察を得るための分析手法と分析事例について議論する。具体的には、われわれが開発した心理学的カテゴリ辞書「J-LIWC」や道徳辞書「J-MFD」を上記データに適用することで、トイレットペーパーやマスクなど転売された商品の種類によって、異なる消費者感情が喚起されたことや、その転売をどのようなモラル違反だと消費者が感じていたのかが可視化された。さらに、単語共起ネットワークを用いた上記データの分析によって、コロナ禍の動向とリンクした転売商品のトレンドや購買行動の変遷が観察された。これらの知見は、ポスト・コロナに向けて社会・経済を再構築していく際のヒントとなる。</p>

DOI： 10.11517/pjsai.jsai2021.0_1d3os3b04

Open Access

CiNii Research

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 Open Access

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 92 巻 ( 1 ) 頁： 31 - 39 2021年

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人日本心理学会

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

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論文 - 五十嵐　祐