Is behavioral pro-sociality game-specific? Pro-social preference and expectations of pro-sociality

We observed the behaviors of the same people across five games – two prisoner’s dilemma games, a trust game (in which the subject took on the role of both truster and trustee), a dictator game, and a faith game – any pair of which was separated by an interval of several months to reduce potential carry-over effects, and found strong consistency in behaviors among these games. We also found consistency between the expectations of other players’ behaviors and the player’s own behavior across games. We further found that the consistent behavioral pro-sociality observed across different games was related to the general measures of pro-social value orientation and perceiving the game situations. These findings suggest that individual and cultural differences in game behaviors can reflect both the ways in which people perceive game situations and their general social preferences.     

Factor Structure,Validity, and Reliability of the Japanese Version of the Balanced Index of Psychological Mindedness (BIPM)

This study examined the measurement properties of the Balanced Index of Psychological Mindedness (BIPM) among the Japanese population. Exploratory factor analysis was conducted to examine the factor structure of the BIPM (Study 1) among 464 university students, and confirmatory factor analysis examined the validity and reliability of the BIPM (Study 2) among 321 university students. Additionally, the mitigation effect of psychological mindedness (PM) for depressive symptoms was examined. The results showed a two-factor structure (Interest and Insight) similar to the original BIPM. The BIPM was negatively correlated with the alexithymia score and positively correlated with the Psychological Mindedness Scale and Openness. It was also significantly correlated with future depressive symptoms. The BIPM is useful for measuring PM in the Japanese population. Additionally, this study suggests clinical applications of PM in psychotherapy and the treatment effect mechanism of cognitive behavioral therapy.     

Influence of rumination and self‐efficacy on depression in Japanese undergraduate nursing students

Researchers have suggested that self‐efficacy can predict and prevent depression, while negative coping strategies, as typified by rumination, can lead to depression. The authors examined the relationship between self‐efficacy, rumination, and depression in Japanese nursing students. The result of a structural equation model showed that rumination, but not self‐efficacy, predicted depression. The result of simultaneous multiple group analysis indicated that there was homogeneity within the same path diagram between genders. The result implied that stress management should focus on controlling the degree of rumination rather than self‐efficacy in order to efficiently maintain the mental health of Japanese nursing students.     

Theory of mind enhances preference for fairness

The purpose of the current study was to examine the role of theory of mind in fairness-related behavior in preschoolers and to introduce a tool for examining fairness-related behavior in children. A total of 68 preschoolers played the Ultimatum Game in a face-to-face setting. Acquisition of theory of mind was defined as the understanding of false beliefs using the Sally-Anne task. The results showed that preschoolers who had acquired theory of mind proposed higher mean offers than children who had not acquired theory of mind. These findings imply that the ability to infer the mental states of others plays an important role in fairness-related behavior.     

Modesty in self‐presentation: A comparison between the USA and Japan

Japanese participants in Study 1 exhibited a self‐effacing tendency when no reason for their self‐evaluation was provided. However, they exhibited a self‐enhancing tendency when they were offered a monetary reward for the correct evaluation. In Study 2, Americans, especially American men, exhibited a self‐enhancing tendency whereas Japanese exhibited a self‐effacing tendency when no reason for making the evaluation was presented. This cultural difference disappeared when participants were provided with a monetary reward for correctly evaluating their performance level. These results support the view that the modesty observed in self‐evaluation among Japanese participants is a ‘default strategy’ to avoid offending others.     

Examining the factor structure of the Psychological Mindedness Scale in the Japanese population through exploratory and confirmatory factor analyses

Psychological mindedness (PM) is a psychological construct that represents the tendency and ability to understand the relationships between thoughts, feelings, and behavior. This study examined the statistical properties, particularly the factor structure, of the Psychological Mindedness Scale (PMS) in a non‐clinical Japanese sample through exploratory and confirmatory factor analysis. The relationship between PMS and depression was also examined for predictive validity. The results suggested that the PMS tested on a Japanese sample contains the following four factors: (a) belief in the benefits of discussing one's problems; (b) access to feelings; (c) openness to new ideas and capacity to change; and (d) interest in the meaning and motivation of own and others' behavior. Whereas the total PM score and Factors 2 and 3 had negative correlations with depression, there was a positive correlation between Factor 4 and depression. The 4‐factor structure of the scale is deemed to be applicable to the Japanese population.     

Clustering preference data in the presence of response-style bias

Preference data, such as Likert scale data, are often obtained in questionnaire-based surveys. Clustering respondents based on survey items is useful for discovering latent structures. However, cluster analysis of preference data may be affected by response styles, that is, a respondent's systematic response tendencies irrespective of the item content. For example, some respondents may tend to select ratings at the ends of the scale, which is called an ‘extreme response style’. A cluster of respondents with an extreme response style can be mistakenly identified as a content-based cluster. To address this problem, we propose a novel method of clustering respondents based on their indicated preferences for a set of items while correcting for response-style bias. We first introduce a new framework to detect, and correct for, response styles by generalizing the definition of response styles used in constrained dual scaling. We then simultaneously correct for response styles and perform a cluster analysis based on the corrected preference data. A simulation study shows that the proposed method yields better clustering accuracy than the existing methods do. We apply the method to empirical data from four different countries concerning social values.