The authors propose that when people become fused with a group, their personal and social identities become functionally equivalent. Two hypotheses follow from this proposition. First, activating either personal or social identities of fused persons should increase their willingness to endorse extreme behaviors on behalf of the group. Second, because personal as well as social identities support group-related behaviors of fused persons, the 2 forms of identity may combine synergistically, fostering exceptionally high levels of extreme behavior. Support for these hypotheses came from 5 preliminary studies and 3 experiments. In particular, fused persons were more willing to fight or die for the group than nonfused persons, especially when their personal or social identities had been activated. The authors conclude that among fused persons, both the personal and social self may energize and direct group-related behavior. Implications for related theoretical approaches and for conceptualizing the relationship between personal identities, social identities, and group processes are discussed.

Identity fusion is a feeling of oneness with the group that induces people to tether their feelings of personal agency to the group. We accordingly proposed that increasing the agency of fused persons by elevating autonomic arousal would amplify their tendency to endorse and actually enact pro-ingroup behavior. In 4 experiments, increasing autonomic arousal through physical exercise elevated heart rates and fusion-unrelated activity among all participants. Fused participants, however, uniquely responded to arousal by translating elevated agency into endorsement of pro-group activity. These effects emerged both for endorsement of extreme behaviors for the group and for overt behaviors, specifically helping behavior (donating money to needy in-group members), and the speed with which participants raced a fusion-related avatar. The effects also generalized across 3 different arousal inductions (dodgeball, wind sprints, and Exercycle). Finally, fusion-related agency partially mediated the interactive effects of fusion and arousal on pro-group behavior. Apparently, autonomic arousal increases agency and identity fusion channels increased agency into pro-group behavior.

Recent research has demonstrated self-verification strivings in groups, such that people strive to verify collective identities, which are personal self-views (e.g., "sensitive") associated with group membership (e.g., "women"). Such demonstrations stop short of showing that the desire for self-verification can fully transcend the self-other barrier, as in people working to verify ingroup identities (e.g., "Americans are loud") even when such identities are not self-descriptive ("I am quiet and unassuming"). Five studies focus on such ingroup verification strivings. Results indicate that people prefer to interact with individuals who verify their ingroup identities over those who enhance these identities (Experiments 1-5). Strivings for ingroup identity verification were independent of the extent to which the identities were self-descriptive but were stronger among participants who were highly invested in their ingroup identities, as reflected in high certainty of these identities (Experiments 1-4) and high identification with the group (Experiments 1-5). In addition, whereas past demonstrations of self-verification strivings have been limited to efforts to verify the content of identities (Experiments 1 to 3), the findings also show that they strive to verify the valence of their identities (i.e., the extent to which the identities are valued; Experiments 4 and 5). Self-verification strivings, rather than self-enhancement strivings, appeared to motivate participants' strivings for ingroup identity verification. Links to collective self-verification strivings and social identity theory are discussed.

Previous research on the common ingroup identity model has focused on how one's representations of members of the ingroup and outgroup influence intergroup attitudes. Two studies reported here investigated how learning how others, ingroup or outgroup members, conceive of the groups within a superordinate category affects intergroup bias and willingness to engage in intergroup contact. Across both studies, high school students who learned that other ingroup members categorized students at both schools within the common identity of "students" showed less intergroup bias in evaluations and greater willingness for contact. However, consistent with the hypothesized effects of identity threat, when participants read that outgroup members saw the groups within the superordinate category, they exhibited a relatively negative orientation, except when ingroup members also endorsed a superordinate identity (Study 1). This result occurred even when the relative status of the groups was manipulated (Study 2).

The present study focuses on the effect of vicarious intergroup contact and the support of an authority figure on the improvement of outgroup and meta-stereotype evaluations. Meta-stereotype refers to the shared beliefs of ingroup members about how they consider outgroup members to perceive their group. Three preliminary studies were carried out to determine desirable and undesirable characteristics for a good basketball performance, the task that best demonstrates the application of these characteristics, and the two groups (basketball teams) that should be involved in the vicarious intergroup contact. Fans of one of the basketball teams participated in the current study. Vicarious intergroup contact improved outgroup and meta-stereotype evaluations as compared with a no contact condition. In addition, the positive effects of vicarious intergroup contact significantly increased when it was supported by an authority figure. More importantly, our study also shows that the improvement of outgroup evaluation was partially mediated by changes on meta-stereotypes. Keywords: vicarious intergroup contact, authority figure, prejudice reduction, metastereotypes, perceived outgroup bias El presente estudio se centra en los efectos del contacto vicario intergrupal y en el apoyo de una figura de autoridad en la mejora de las evaluaciones del exogrupo y del metaestereotipo. Meta-estereotipo se refiere a las creencias compartidas de los miembros del endogrupo sobre cómo creen que los miembros del exogrupo les perciben. Se llevaron a cabo tres estudios preliminares para determinar las características deseables e indeseables para un buen desempeño en el baloncesto, la tarea que mejor demostraría la aplicación de estas características, y los dos grupos (equipos de baloncesto) que deberían implicarse en el contacto vicario intergrupal. En el presente estudio participaron los seguidores de uno de dichos equipos. El contacto vicario intergrupal mejoró la evaluación del exogrupo y del meta-estereotipo en comparación a una condición de no contacto. Adicionalmente, los efectos positivos del contacto vicario intergrupal aumentaron significativamente cuando fue apoyado por una figura de autoridad. Más importante todavía, nuestro estudio muestra que la mejora de la evaluación del exogrupo estuvo mediada parcialmente por los cambios en el meta-estereotipo. Palabras clave: contacto intergrupal vicario, figura de autoridad, reducción de prejuicio, meta-estereotipos, sesgo exogrupal percibido