日本の社会心理学者たちは，活発な研究活動を展開・公表しており，その成果は日本語による論文であれば例えば日本社会心理学会の機関誌である「社会心理学研究」等の学会誌に掲載され，また学術書として公刊されています．一方，当然のことながら学問に国境はなく，特に近年では国際的な論文誌や書籍にその成果が掲載されることも増えてきました．しかし，こうした国際的成果をくまなく知ることは，あまりにそのフィールドが広いためにあまり容易ではありませんでした．
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Kawamura & Kusumi (2017)
Kawamura, Y. (河村悠太), & Kusumi, T. (楠見孝) (2017).
The norm-dependent effect of watching eyes on donation.
"見つめる目"の規範依存的効果の検討.
Evolution and Human Behavior, 38(5), 659-666.
doi: 10.1016/j.evolhumbehav.2017.05.003
Although many previous studies have shown that eye-like images promote generosity, the mechanism of this “watching eyes effect” remains unclear. One possible cause is the concern for a good reputation as a generous person, while the other is the concerns for a bad reputation as a norm violator. To elucidate which of these two concerns is the main influencer, the present study conducted a laboratory experiment that investigated whether the watching eyes effect changed depending on social norms. If the concern for a good reputation leads to the effect, prosocial behavior would be more likely in the presence of watching eyes, regardless of the social norms involved. However, if the concern for avoiding a bad reputation as a norm violator leads to the effect, watching eyes promote prosocial behavior only in the existence of prosocial norms. In the original study, participants were asked to make a charitable donation under conditions in which eye-like images either were or were not present. In addition to the eye-like images, we manipulated prosocial norms by informing each participant of either high or low mean donation amounts given by previous participants. We found that watching eyes promoted donations only when a prosocial norm existed. This supports the idea that the watching eyes effect is caused by a concern for avoiding a bad reputation from violating norms. However, in a replication study, we were unable to replicate the original results; watching eyes did not promote generosity regardless of the norm. Taken together, we discussed the moderation effect of norms and the possibility of other moderators.
Kawamoto & Furutani (2018)
Kawamoto, T. (川本大史) & Furutani, K. (古谷嘉一郎) (2018).
The mediating role of intolerance of uncertainty on the relationships between perfectionism dimensions and psychological adjustment/maladjustment among mothers
母親の完全主義次元と心理適応・不適応との関連に対する不確実さ不耐性の媒介効果
Personality and Individual Differences, 122, 62-67.
doi: 10.1016/j.paid.2017.10.008
The present study investigated a possible mediating effect of intolerance of uncertainty (IU) on the relationship between perfectionism and psychological adjustment/maladjustment as well as the unique and common effects of perfectionism dimensions—personal standards (PS) and concern over mistakes (CM)—on these constructs. Five hundred mothers participated an online survey, completing measures of perfectionism (PS and CM), IU, and psychological adjustment/maladjustment (life satisfaction, depression, and rearing stress). We found that both PS and CM were positively correlated with IU. Mediation analyses indicated that IU mediated the relationship between CM and psychological adjustment/maladjustment regardless of whether PS were partialled out. In contrast, IU had a suppression effect on the relationship between PS and psychological adjustment/maladjustment, but only when CM was not partialled out. Commonality regression analysis revealed that the unique effect of PS on IU (< 0.1%) was much smaller than the common effects of PS and CM on IU (12.3%). In addition, CM had stronger unique effects on all variables than did PS. These findings highlight the importance of investigating both the unique and common effects of perfectionism dimensions on outcome variables. Our findings further our understanding of the mechanisms underlying the relationships between perfectionism dimensions and psycho- logical adjustment/maladjustment.
(2017年12月2日まで無料でダウンロード可能なリンク)
https://authors.elsevier.com/a/1VtoRheKdYmRQ
Ishii et al. (2017)
Ishii, K. (石井敬子), Mojaverian, T., Masuno, K., & Kim, H. S. (2017).
Cultural Differences in Motivation for Seeking Social Support and the Emotional Consequences of Receiving Support: The Role of Influence and Adjustment Goals.
ソーシャルサポートを求める際の動機づけとそれを受け取ることの感情的な帰結における文化差：影響と調整志向の役割
Journal of Cross-Cultural Psychology, 48(9), 1442-1456.
doi: 10.1177/0022022117731091
Previous research suggests that the benefits of different types of social support depend on cultural background. However, cultural variations in the underlying motivations for seeking social support and the emotional implications of receiving support have not yet been clearly explored. We hypothesized and found that European Americans emphasized the motivation for self-esteem as a factor in deciding to seek explicit social support (e.g., advice, emotional comfort), whereas Japanese emphasized relational concerns as a factor in deciding to seek implicit social support (e.g., the emotional comfort experienced without disclosing one’s problems). Furthermore, European Americans anticipated experiencing strong feelings of self-esteem and pride regarding receiving support, whereas Japanese anticipated experiencing strong feelings of shame and guilt. Additionally, influence goals mediated cultural differences in the motivation for self-esteem and the experience of self-esteem and pride, whereas adjustment goals mediated cultural differences in relational concerns and the experience of shame and guilt.
Masuda et al. (2017)
Masuda, T. (増田貴彦), Ishii, K. (石井敬子), Miwa, K., Rashid, M., Lee, H., & Mehdi, R. (2017).
One label or Two? Linguistic Influences on the Similarity Judgment of Objects Between English and Japanese Speakers.
1つのラベルか、それとも2つのラベルか? 英語と日本語話者間での物の類似性判断における言語の影響
Frontiers in Psychology, 8, 1637
doi: 10.3389/fpsyg.2017.01637
Recent findings have re-examined the linguistic influence on cognition and perception, while identifying evidence that supports the Whorfian hypothesis. We examine how English and Japanese speakers perceive similarity of pairs of objects, by using two sets of stimuli: one in which two distinct linguistic categories apply to respective object images in English, but only one linguistic category applies in Japanese; and another in which two distinct linguistic categories apply to respective object images in Japanese, but only one applies in English. We conducted four studies and tested different groups of participants in each of them. In Study 1, we asked participants to name the two objects before engaging in the similarity judgment task. Here, we expected a strong linguistic effect. In Study 2, we asked participants to engage in the same task without naming, where we assumed that the condition is close enough to our daily visual information processing where language is not necessarily prompted. We further explored whether the language still influences the similarity perception by asking participants to engage in the same task basing on the visual similarity (Study 3) and the functional similarity (Study 4). The results overall indicated that English and Japanese speakers perceived the two objects to be more similar when they were in the same linguistic categories than when they were in different linguistic categories in their respective languages. Implications for research testing the Whorfian hypothesis and the requirement for methodological development beyond behavioral measures are discussed.
Takano et al. (2017)
Takano, Y., Ukezono, M., Nakashima, S. F. (中嶋智史), Takahashi, N., & Hironaka, N. (2017).
Learning of efficient behaviour in spatial exploration through observation of behaviour of conspecific in laboratory rats.
実験室ラットの空間探索における他個体の行動の観察を通じた効率的行動の学習
Royal Society Open Science, 4, 170121
doi: 10.1098/rsos.170121
Recent studies have suggested that rodent behaviour is influenced by the behaviour of surrounding conspecifics (e.g. emotional contagion and prosocial behaviour). However, little is known about deferred imitation and complex observational learning in rats. The purpose of this study was to reveal whether rats can learn from another rat’s experiences. In a maze, observer rats watched the foraging behaviour of other rats (demonstrators) and then foraged in turn. The results showed that demonstrators explored inefficiently, but observers explored more efficiently after observing inefficient exploration by the demonstrators. This observational learning probably involved the acquisition of an efficient strategy through spatial exploration.
Miyajima & Yamaguchi (2017)
Miyajima, T. (宮島健), & Yamaguchi, H. (山口裕幸) (2017).
I Want to but I Won't: Pluralistic Ignorance Inhibits Intentions to Take Paternity Leave in Japan.
取りたいけど取らない: 多元的無知が日本における男性の育児休業の取得意図を抑制する
Frontiers in Psychology, 8, 1508.
doi: 10.3389/fpsyg.2017.01508
The number of male employees who take paternity leave in Japan has been low in past decades. However, the majority of male employees actually wish to take paternity leave if they were to have a child. Previous studies have demonstrated that the organizational climate in workplaces is the major determinant of male employees’ use of family-friendly policies, because males are often stigmatized and fear receiving negative evaluation from others. While such normative pressure might be derived from prevailing social practices relevant to people’s expectation of social roles (e.g., “Men make houses, women make homes”), these social practices are often perpetuated even after the majority of group members have ceased to support them. The perpetuation of this unpopular norm could be caused by the social psychological phenomenon of pluralistic ignorance. While researches have explored people’s beliefs about gender roles from various perspectives, profound understanding of these beliefs regarding gender role norms, and the accuracy of others’ beliefs remains to be attained. The current research examined the association between pluralistic ignorance and the perpetually low rates of taking paternity leave in Japan. Specifically, Study 1 (n = 299) examined Japanese male employees’ (ages ranging from the 20 s to the 40 s) attitudes toward paternity leave and to estimate attitudes of other men of the same age, as well as behavioral intentions (i.e., desire and willingness) to take paternity leave if they had a child in the future. The results demonstrated that male employees overestimated other men’s negative attitudes toward paternity leave. Moreover, those who had positive attitudes toward taking leave and attributed negative attitudes to others were less willing to take paternity leave than were those who had positive attitudes and believed others shared those attitudes, although there was no significant difference between their desires to take paternity leave. Study 2 (n = 425) replicated these results and further indicated that they could not be explained by the participants’ needs to be socially desirable. Together, our findings suggest that pluralistic ignorance occurs in the context of taking paternity leave in Japanese men, and this leads to the low use of available paternity leave.
プレスリリース（九州大学）：男性の育休取得を阻んでいる一因とは?～間違った思い込みから生まれる心理的壁～
Kosugi(2017)
Kosugi,K.E.（小杉考司）(2017). Asymmetrical triadic relationship based on the structural difficulty. 構造的困難度に基づく非対称な三者関係の分析 Behaviormetrika,44(2),1--17. doi: 10.1007/s41237-017-0033-9Using Bayesian inference, this study aims to estimate the magnitude of the cognitive load when a person perceives asymmetric social relations. Some empirical evidence relating to balance theory has shown that a balanced state is comparatively easier to memorize than an unbalanced one. In this study, since a balanced state is defined by structural complexity, an experimental hypothesis was set whereby asymmetric social relationships have different difficulty levels depending on structural complexity. The balanced state of an asymmetric relation as structural difficulty is formally derived from the eigenvalue structure of a Hermitian matrix. Asymmetric triadic relations are modeled as featuring three kinds of structural difficulties according to the eigenvalue decomposition of the Hermitian matrix and pattern-specific difficulties. The differences among the structural difficulties were not sufficiently significant to exceed pattern-specific difficulties, but the Bayes factor of the informational hypothesis of this research yielded positive effects.
Kawamoto(2017)
Kawamoto, T. (川本大史) (2017).
What happens in your mind and brain when you are excluded from a social activity?
社会的に排斥されるとあなたのこころと脳で何が起こるのだろうか？
Frontiers for Young Minds, 5:46.
doi: 10.3389/frym.2017.00046
In school and in everyday life, we sometimes experience rejection by classmates, or we might see someone being excluded from an activity. What do excluded individuals feel? How does the brain process information about being socially excluded? In the past few decades, psychologists and social neuroscientists have investigated the influence of social exclusion on our mind, brain, and behavior. Social exclusion is a complex and ambiguous phenomenon, and therefore, we process information about it dynamically and often cope with it flexibly. In this article, I have described the dynamic effects of social exclusion on our mind, brain, and behavior by developing a model of what happens in the brain and the actions people take upon experiencing social exclusion.
Tanibe et al. (2017)
Tanibe, T. (谷辺哲史), Hashimoto, T. (橋本剛明), & Karasawa, K. (唐沢かおり) (2017).
We perceive a mind in a robot when we help it.
ロボットを助けるとロボットに心を感じる
PLoS ONE, 12(7): e0180952.
People sometimes perceive a mind in inorganic entities like robots. Psychological research has shown that mind perception correlates with moral judgments and that immoral behaviors (i.e., intentional harm) facilitate mind perception toward otherwise mindless victims. We conducted a vignette experiment (N = 129; Mage = 21.8 ± 6.0 years) concerning human-robot interactions and extended previous research’s results in two ways. First, mind perception toward the robot was facilitated when it received a benevolent behavior, although only when participants took the perspective of an actor. Second, imagining a benevolent interaction led to more positive attitudes toward the robot, and this effect was mediated by mind perception. These results help predict what people’s reactions in future human-robot interactions would be like, and have implications for how to design future social rules about the treatment of robots.
Matsunaga et al. (2017)
Matsunaga, M., Ishii, K. (石井敬子), Ohtsubo, Y. (大坪庸介), Noguchi, Y., Ochi, M. (越智美早), & Yamasue, H. (2017).
Association between salivary serotonin and the social sharing of happiness.
唾液セロトニンと幸せの社会的共有との関連
PloS ONE, 12(7), e0180391.
doi: 10.1371/journal.pone.0180391
Although human saliva contains the monoamine serotonin, which plays a key role in the modulation of emotional states, the association between salivary serotonin and empathic ability remains unclear. In order to elucidate the associations between salivary serotonin levels, trait empathy, and the sharing effect of emotions (i.e., sharing emotional experiences with others), we performed a vignette-based study. Participants were asked to evaluate their happiness when they experience several hypothetical life events, whereby we manipulated the valence of the imagined event (positive, neutral, or negative), as well as the presence of a friend (absent, positive, or negative). Results indicated that the presence of a happy friend significantly enhanced participants’ happiness. Correlation analysis demonstrated that salivary serotonin levels were negatively correlated with happiness when both the self and friend conditions were positive. Correlation analysis also indicated a negative relationship between salivary serotonin levels and trait empathy (particularly in perspective taking), which was measured by the Interpersonal Reactivity Index. Furthermore, an exploratory multiple regression analysis suggested that mothers’ attention during childhood predicted salivary serotonin levels. Our findings indicate that empathic abilities and the social sharing of happiness decreases as a function of salivary serotonin levels.