Kunihiro Yokota

• Hiroshima Shudo University

The purpose of this study is to investigate whether conformist bias can be observed in information-seeking situations. We replicated the experiment conducted by Fujikawa et al. (2024), in which conformist bias was observed, using a between-participants design. In Experiments 1 (N = 116) and 2 (N = 157), participants responded to “yes/no” questions...

We examined whether conformity bias was observed in social dilemma situations. Cultural group selection theory argues that conformity can establish a cooperative group in a society, which has been theoretically and empirically supported. However, conformity bias has not been examined in most previous studies. Conformity bias refers to the bias that...

This study aimed to explore the effect of scientific literacy on the tendency towards purchase avoidance of foods made in Fukushima due to harmful rumours associated with the Fukushima Daiichi Nuclear Power Plant accident. A web survey was sent to 880 Japanese monitors to determine their attitudes towards the damage caused by untrue rumours, food r...

The present study investigated the replicability of a series of Nakagawa et al.’s research. The findings in the previous studies showed ingroup cooperation based on the Social Identity Theory (SIT) and the Bounded Generalized Reciprocity hypothesis (BGR). The cost of cooperation can moderate the relationship between ingroup collaboration and the ex...

This study examined the effect of others’ behaviour on ingroup cooperation in intergroup conflict situations. Following cultural group selection theory, reference to other group members’ behaviour enhances ingroup cooperation in these situations. The validity of the cultural group selection theory was confirmed using an evolutionary simulation and...

We aimed to examine the external validity of social identity theory (SIT) and the bounded generalized reciprocity hypothesis (BGR) generated ingroup cooperation in real groups. Previous studies demonstrated that ingroup cooperation predicted by both theories was observed in the minimal group, whereas neither theory was supported in real groups. How...

This study aimed to test the validity of social identity theory (SIT) and bounded generalized reciprocity hypothesis (BGR) to explain ingroup cooperation in real social groups. Each of the validity of SIT and BGR have been discussed by social psychologists for a long time. However, recent studies indicate that both theories could explain ingroup co...

In this study, we aimed to test the hypothesis that intergroup conflict would enhance not only ingroup cooperation, but also conformity (frequency-dependent tendency). One hundred and eighty undergraduate students participated in a vignette experiment. They read four scenarios describing daily intergroup conflict situations, and rated behavioral in...

Using evolutionary simulation, Yokota and Nakanishi (2012) have shown that majority syncing (generalized tit-for-tat strategy) is an adaptive strategy in intergroup conflict situations. When intergroup conflict is mild, agents who cooperate with ingroup members and ensure their behavior conforms to other members' cooperation rates facilitate cooper...

In this study, we tested the theoretical validity of both Social Identity Theory (SIT) and the Bounded Generalized Reciprocity Hypothesis (BGR) for explaining in-group cooperation in real social groups. While most previous investigation on real social groups has found support for SIT, confirmatory evidence for BGR remains limited. We conducted a vi...

In this paper we developed a scale to measure relational mobility, or the general amount of opportunities there are to form new relationships, when necessary, in a given society or social context. Depending on the nature of the particular society, network, or organization into which one is embedded, the number of opportunities individuals have to f...