Threats to masculinity can trigger compensatory mechanisms such as risk-taking, aggression, or disparagement of gender atypical others. In Study 1 (N ϭ 76) we tested whether threat to men's agentic self (information about the level of testosterone) influences men's (a) attitudes toward parental duties, and (b) their support for gender equality. Polish men (but not women) whose gender identity was threatened manifested more traditional attitudes toward parental duties, were more willing to endorse stereotypical gender roles, and showed less support for gender equality and less willingness to support collective egalitarian actions. In Study 2 (N ϭ 313) we found that agency is related to gender system justification in men, suggesting a potential mediator of the effects related to compensatory mechanisms evoked by a gender identity threat among men. This was confirmed in Study 3 (N ϭ 131), where participants read a short scientific text either (a) emphasizing the existence of stereotypical gender differences in terms of agency and communality, or (b) claiming that there are no such differences. Results indicated that in the "no differences" condition, men (but not women) showed lower acceptance of gender inequality and a greater willingness to engage in domestic activities. This effect was mediated by participants' self-perceived agency.

Four studies were carried out to examine how identity fusion, self‐ and group efficacy, and collective action are related and what role self‐expansion plays in these relationships. In the pilot study, participants recalled their experience of participating in mass gatherings. The three other studies were conducted during mass gatherings organized for collective purposes: a music concert (Study 1), a bicycle activist event (Study 2), and Equality Days (Study 3). The results showed (a) a significant positive relationship between personal and group identity fusion, self‐expansion, and self‐efficacy (Study 1); (b) a significant mediating effect of self‐expansion on the relationship between personal and group identity fusion and group efficacy (Studies 1 and 2); and (c) a significant mediating effect of self‐ expansion and group efficacy on the relationship between identity fusion and collective action tendency (Studies 2 and 3).

Two studies (N = 190 and N = 447) were conducted to investigate the link between living in walkable neighborhoods and satisfaction with life in a city. Additionally, we explore possible mediators of this relationship. In both studies walkability was a significant predictor of perceived quality of life in a city, and overlap between personal and communal identity (in Study 1 and Study 2) and city identification (Study 2) were mediators of the walkability—quality of life relation. Implications for research on environmental qualities of neighborhoods and on self-concept and communal identity are discussed.

Identity fusion theory proposed that fused individuals have a visceral feeling of oneness with the group and this leads them to engage in radical, violent pro-group behaviours. Other approaches to group extremism link acceptance of violence to right-wing authoritarianism (RWA) and social dominance orientation (SDO). We extended previous research on fusion in three ways. First, by exploring if identity fusion is a significant predictor of the willingness to fight for a group, when controlling for group identification, left-wing authoritarianism (LWA), RWA and SDO. Secondly, we controlled for a membership in a group known for radical action directed at out-groups, namely football hooligans. Finally, we added a second outcome variable, which is the acceptance of violent change of the current social system. The participants were self-described football hooligans (N = 24) and undergraduate students (N = 155). Regression analyses revealed that the strongest predictor of willingness to defend in-group was identity fusion, with RWA and group identification significant as well. RWA and LWA emerged as the strongest predictors of acceptance of violent change. The effect of group membership wasn’t significant.