国際誌論文データベース

Kawamoto, T. (川本大史), & Hiraki, K. (2019). 
Parental presence with encouragement alters feedback processing in preschoolers: An ERP study. 
親の応援が5歳児のフィードバック処理を変える：ERP研究 
Social Neuroscience, 14, 499-504.
doi: 10.1080/17470919.2018.1527250 

External feedback plays an important role in adapting to the environment; however, feedback processing in preschoolers has not been fully understood. The present event-related brain potential (ERP) study sought to understand the influence of parental presence with encouragement on feedback processing by focusing on reward positivity (RewP: mean amplitude between 200–350 ms). Five-year-old children (N = 21) completed an animal search task both alone (the alone condition) and with a parent who offered words of encouragement (the with a parent condition). ERPs were recorded while they received negative and positive feedback. We found a larger RewP amplitude in response to positive feedback in the with a parent condition relative to in the alone condition. In addition, differences in RewP between positive and negative feedback were only observed in the with a parent condition. These findings suggest that everyday parental encouragement has the potential to promote differential positive and negative feedback processing possibly by enhancing the reward value of positive feedback.

Horita, Y.（堀田結孝） & Takezawa, M. （竹澤正哲） (2018). 
Cultural differences in strength of conformity explained through pathogen stress: A statistical test using hierarchical Bayesian estimation 
病原体の蔓延度から説明される同調傾向の文化差：階層ベイズによる推定
Frontiers in Psychology, 9, 1921. doi: 10.3389/fpsyg.2018.01921

The severity of the environment has been found to have played a selective pressure in the development of human behavior and psychology, and the historical prevalence of pathogens relate to cultural differences in group-oriented psychological mechanisms, such as collectivism and conformity to the in-group. However, previous studies have also proposed that the effectiveness of institutions, rather than pathogen stress, can account for regional variation in group-oriented psychological mechanisms. Moreover, previous studies using nations as units of analysis may have suffered from a problem of statistical non-independence, namely, Galton’s problem. The present study tested whether or not regional variation in pathogen stress, rather than government effectiveness, affected collectivism and conformity to social norms by adjusting the effect of global regions using hierarchical Bayesian estimation. We found that the overall effect of pathogen stress remained significant in only one out of the four indices of the regional variability of conformity, and the effects of the government effectiveness also disappeared. Instead, we found that significant effects of both pathogen stress and government effectiveness in specific regions of the world, but these effects were not stable across the measurements. These results indicate that both the effects of pathogen stress and government effectiveness need further reevaluation.  

Ishii, K. (石井敬子) (2019). 
Cultural influences in somatosensory amplification and their association with negative affectivity. 
身体感覚の増幅における文化的な影響およびネガティブ感情との関連性 
Asian Journal of Social Psychology, 22, 106-112. 
doi: 10.1111/ajsp.12342 

Previous research has indicated that, reflecting East Asians’ holistic attentional style, they are likely to emphasize more somatic symptoms and perceive their internal visceral states less accurately as compared with Westerners. Based on these findings, comparing representative samples of Americans and Japanese participants, this research examined whether somatosensory amplification would vary across cultures. Moreover, by controlling confounding factors, including neuroticism and chronic disorders, the possibility that the association between somatosensory amplification and negative affective states differs across cultures also was tested. The results showed that Japanese exhibit higher somatosensory amplification than do Americans. In both cultures, as neuroticism and the number of chronic disorders increased, negative affective states also increased, leading to higher somatosensory amplification. Whereas negative affective states completely mediated the paths of neuroticism and chronic disorders to somatosensory amplification in the United States, such mediation was partial in Japan. Moreover, the association between somatosensory amplification and negative affective states was weaker in Japanese than in Americans.

Mori, Y., & Ishii, K. (石井敬子) (2018). 
The effect of auditory imagery for speech in reading in Japanese. 
発話の聴覚的イメージが日本人の読みに与える効果 
Current Psychology, 39, 2343–2350. 
doi: 10.1007/s12144-018-9946-z 

Auditory images for speech are preserved and can be accessed during reading. This research, conducted in Japan, examined whether and to what extent previous findings on the influence of speaker-specific auditory images in reading can be generalized to non-English speakers in a different cultural context. In two studies, Japanese participants were asked to read a text aloud after being informed that the text had been written by either a fast speaker or a slow speaker whose speech they were to listen to. The participants read the episode more slowly when it was attributed to a slow speaker than when it was attributed to a fast speaker. Individual differences in one’s mimicry of the speaker moderated the influence of speaker-specific auditory images in reading. The influence was confirmed only for those who consciously mimicked the speaker. In contrast, situational cues manipulated to generate affiliation with and closeness to the speakers did not influence the participants’ reading times.

Ishii, K. (石井敬子), & Eisen, C. (カリス・アイゼン) (2018). 
Cultural similarities and differences in social discounting: The mediating role of harmony-seeking. 
社会割引における文化的類似と差異：協同調和傾向による媒介 
Frontiers in Psychology, 9, 1426. 
doi: 10.3389/fpsyg.2018.01426 

One’s generosity to others declines as a function of social distance, which is known as social discounting. We examined cultural similarities and differences in social discounting and the mediating roles of the two aspects of interdependence (self-expression and distinctiveness of the self) as well as the two aspects of independence (harmony-seeking and rejection avoidance). Using the same procedure that previous researchers used to test North Americans, Study 1 showed that compared to North Americans, Japanese discount more steeply a partner’s outcomes compared to their own future outcomes, whereas the decrease in the subjective value of the partner’s outcomes accelerates less as a function of social distance. To examine the cultural similarities and differences in social discounting in more detail, Study 2 tested Japanese and Germans and found that the hyperbolic with exponent model fitted the participants’ discounting behaviors better than the other models, except for the loss condition in Germans where the utility of the q-exponential model was indicated. Moreover, although the social discounting rate was higher in Japanese than in Germans, the cultural difference was limited to the gain frame. However, the decline in a person’s generosity accelerated less as a function of social distance in Japanese than in Germans. Furthermore, the cultural difference in the social discounting in gains was mediated by the level of harmony-seeking, which was higher in Germans than in Japanese. Implications for individuals’ generosity against the backdrop of cultural characteristics are discussed.

Kusano, K. (草野広大) and Kemmelmeier, M. (2018). 
Ecology of freedom: Competitive tests of the role of pathogens, climate, and natural disasters in the development of socio-political freedom. 
自由の生態学：病原体、気候、自然災害が社会・政治的自由の発達に与える役割の競争的検証 
Front. Psychol. 9:954. 
doi: 10.3389/fpsyg.2018.00954 

Many countries around the world embrace freedom and democracy as part of their political culture. However, culture is at least in part a human response to the ecological challenges that a society faces; hence, it should not be surprising that the degree to which societies regulate the level of individual freedom is related to environmental circumstances. Previous research suggests that levels of societal freedom across countries are systematically related to three types of ecological threats: prevalence of pathogens, climate challenges, and natural disaster threat. Though their incidence overlaps, the literature has not yet provided a competitive test. Drawing upon the ecocultural framework, we tested five rival hypotheses, alternately focused on the above ecological factors and their interactions with economic wealth in explaining country variations in socio-political freedom. Focusing on data from 150 countries, we performed a series of linear mixed-effects regressions predicting freedom in the domains of politics, media, and economy. We found that countries with higher pathogen prevalence were more likely to suppress democracy and media freedom. Economic wealth, however, moderated the effect of pathogen prevalence on economic freedom, with the main effect being only found among wealthy countries, but not among poor countries. In contrast, natural disaster threat predicted political freedom and press freedom only among poor countries, consistent with the idea that disaster threat accompanied by poor resources promote socio-political freedom as a means of increasing collective survival. Throughout our analyses, we found no support for hypotheses based on climatic challenges. In addition, our multilevel approach revealed that country scores for socio-political freedom were highly clustered within world regions, accounting for substantial portions of variance. Overall, the present research offers a nuanced view of the interplay between ecology and wealth in the emergence of socio-political freedom. We discuss new directions in future research considering methodological and theoretical contributions of the present findings.  文化心理学では、環境が社会や心理にどのように影響を与えるのかと言う点について、様々な研究がなされてきた。先行研究は、主に病原体、気候、自然災害の３つの環境要因と、個人主義や民主主義などの国レベルの自由の指標の関係を検証する研究が多く行われて来た。病原体、気候、自然災害などの要因は、互いに独立していない環境要因であるにも関わらず、先行研究では、これらの要因についての理論を包括的に検証する試みがなされていなかった。そこで本研究では、これら３つの環境要因と、経済的豊かさ（GDP per capita）を全て考慮したモデルを検証した。さらに本研究は、先行研究の国レベルの分析における統計的な誤り（独立性の仮定）を指摘し、マルチレベル分析を用いることで、独立性の無視によって起こる推定バイアスを部分的に調整した。その結果、病原菌感染率の低い国においては、民主主義が高まる傾向にある、といった示唆が得られた。

Takano, Y.（高野陽太郎） & Osaka, E. （纓坂英子） (2018).
Comparing Japan and the United States on individualism/collectivism: A follow-up review 
集団主義・個人主義に関する日米比較： 展望の続報
Asian Journal of Social Psychology 
doi: 10.1111/ajsp.12322 

It has been long believed that the Japanese are typical collectivists whereas Americans are typical individualists. To examine the validity of this common view, we formerly reviewed 15 empirical studies that compared Japanese and Americans regarding individualism/collectivism (I/C), and found that the overwhelming majority of those studies had not supported the common view (Takano & Osaka, 1999). In this follow-up, we reviewed 20 additional empirical studies (7 behavioral studies, 13 questionnaire studies), most of which had been published after the former review. When combined with the formerly reviewed 15 studies, 19 studies reported no clear difference, and 11 studies reported that Japanese were more individualistic than Americans. These 30 studies are inconsistent with the common view. Only 5 studies supported the common view, even when we included 3 studies whose validity was questionable. After it was formerly found that the common view was not supported empirically, a variety of alternative accounts were presented regarding the reason for this finding. We examined three major accounts in light of the reviewed studies and found that none of them was congruent with the empirical data. Thus, it seems to be reasonable to conclude that the common view is not valid.  日本人論では、長らく「日本人は集団主義的、アメリカ人は個人主義的」だと論じられてきました。20年前、私たちは日本人とアメリカ人を比較した実証的研究を探索し、見つかった15件の研究がこの通説を支持していないことを報告しました（Takano & Osaka, Asian Journal of Social Psychology, 1999）。今回は、その後に発表された研究を中心に、新たに20件の実証的研究を調べ、やはり全体としては通説を支持していないことを見出しました。また、前回の報告について、通説を支持する立場から提出された主な別解釈を３つ取り上げ、それらが実証的研究とは一致しないことも明らかにしました。

Shimotomai, A. （下斗米淳）（2018）
Parental social power, co-parenting, and child attachment: early to late japanese adolescence transitions.
親の社会的勢力、協働子育て、そして子どもの愛着： 初期から後期青年期にかけての推移
Current Psychology, 20, 1-12.
doi.org/10.1007/s12144-018-9811-0

The purposes of this study were to examine how adolescents’ perceptions of parental powers and how bases of power between the father and the mother separately impact adolescents’ attachment to their father and mother, as well as the changing pattern of such impact. The participants were 44 junior high school students (M = 14.32 years old), 88 high school students (M = 17.27 years old), and 61 university students (M = 20.54 years old) in Japan. Adolescents’ attachment to their parents and their perceptions of parental social powers were assessed. The results indicated that adolescents had a significantly high perceptions of parental expert power. Moreover, the similarity between parental powers strongly impacted the behavioral bonds of adolescents’ attachment. Furthermore, powers between parents mutually defined and influenced the attachment of late adolescents to their parents. Thus, the present study could point out adolescents’ rebuilding their parent-child relationships and the interdependence of parents in child-rearing. These findings are discussed from the perspectives of co-parenting and the social adjustment of parents and children.

Kawamoto, T.(川本大史), Furutani, K.(古谷嘉一郎), & Alimardani, M. (2018).
Preliminary validation of Japanese version of the Parental Burnout Inventory and its relationship with perfectionism.
日本語版子育てバーンアウト尺度の妥当性検討および完全主義との関連
Frontiers in Psychology, 9:970.
doi: 10.3389/fpsyg.2018.00970

Parenting is a precious experience and also a very hard task, which could result in parental burnout for some parents. The present study sought to validate a Japanese version of the Parental Burnout Inventory (PBI-J) by replicating and extending the pioneering work of Roskam et al. (2017). We conducted a web survey (N = 1200) to first validate the PBI-J and second to investigate the association between the PBI-J and perfectionism as a new interrelation. Similar to the prior study of Roskam et al. (2017), confirmatory factor analysis supported a model of three-factor structure of the PBI-J: emotional exhaustion, lack of personal accomplishment, and emotional distancing. In addition, we found low to moderate correlations of parental burnout with job burnout, parental stress, and depression. These findings provided initial evidence for validity of the PBI-J and suggested that parental burnout appeared to be different from job burnout. Our further evaluation of perfectionism confirmed such a difference between parental and job burnout by showing that parental perfectionism [i.e., combination of parental personal standards (PS) and parental concern over mistakes (CM)] has a unique contribution to parental burnout than does job perfectionism (i.e., combination of job PS and job CM). In addition, CM was positively correlated with burnout in both domains whereas the associations between PS and burnout were more complex. Finally, the proportion of parents experiencing burnout was estimated to lie somewhere between 4.2 and 17.3% in Japan. Overall, the present study confirmed preliminary validity of the PBI-J and found that parental perfectionism is one of the vulnerability factors in parental burnout.

Miyagawa, Y. (宮川裕基), Taniguchi, J. (谷口淳一), & Niiya, Y. (新谷優) (2018). 
Can self-compassion help people regulate unattained goals and emotional reactions toward setbacks? 
セルフコンパッションは達成できなかった目標の制御やその挫折経験への情動反応の制御を促すのか 
Personality and Individual Differences, 134, 239-244. 
doi:10.1016/j.paid.2018.06.029 

The current study examined whether self-compassion helps individuals cope with the experience of unattainable goals. Because self-compassion entails taking a balanced perspective of one’s suffering and maintaining emotional stability, this study predicted that individuals high in self-compassion would be more likely to disengage from their unattained goals and reengage in an alternative important goal, and thus, be less likely to experience negative emotions toward their setback in goal attainment. Japanese undergraduates (N = 177), who had completed a measure of self-compassion a week prior, recalled their personal failure of goal attainment and answered items about the degree of goal disengagement, goal reengagement, and current negative emotions toward their setback. Structural equation modeling showed that self-compassion was positively related to goal reengagement and goal disengagement, and that self-compassion had a significant negative indirect effect on current negative emotions via goal disengagement, in addition to a negative direct effect. These results were mainly in accordance with predictions, suggesting that self-compassion is a psychological resource for coping with setbacks in goal attainment.