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Research Articles

How identity fusion predicts extreme pro-group orientations: A meta-analysis

, , , , & ORCID Icon
Pages 162-197 | Received 01 Nov 2022, Accepted 08 Mar 2023, Published online: 29 Mar 2023

References

  • Altemeyer, R. A., & Altemeyer, B. (1996). The authoritarian specter. Harvard University Press.
  • Atran, S. (2021). Psychology of transnational terrorism and extreme political conflict. Annual Review of Psychology, 72(1), 471–501. https://doi.org/10.1146/annurev-psych-010419-050800
  • Atran, S., Sheikh, H., & Gómez, A. (2014). For cause and comrade: Devoted actors and willingness to fight. Cliodynamics: The Journal of Quantitative History and Cultural Evolution, 5(1), 41–57. https://doi.org/10.21237/c7clio5124900
  • Becker, B. J., & Wu, M. J. (2007). The synthesis of regression slopes in meta-analysis. Statistical Science, 22(3), 414–429. https://doi.org/10.1214/07-STS243
  • Besta, T. (2014). Overlap between personal and group identity and its relation with radical pro-group attitudes: Data from a Central European cultural context [group & interpersonal processes 3020]. Studia psychologica, 56(1), 67–81. https://doi.org/10.21909/sp.2014.01.651
  • Besta, T., Gómez, Á., & Vázquez, A. (2014). Readiness to deny group’s wrongdoing and willingness to fight for its members: The role of poles’ identity fusion with the country and religious group. Current Issues in Personality Psychology, 2(1), 49–55. https://doi.org/10.5114/cipp.2014.43101
  • Besta, T., & Kossakowski, R. (2018). Football supporters: Group identity, perception of ingroup and outgroup members and pro-group action tendencies. Revista De Psicologia Del Deporte, 27(2), 15–22.
  • Besta, T., Szulc, M., & Jaśkiewicz, M. (2015). Political extremism, group membership and personality traits: who accepts violence?/Extremismo político, pertenencia al grupo y rasgos de personalidad: ¿Quién acepta la violencia? Revista De Psicologia Social, 30(3), 563–585. https://doi.org/10.1080/02134748.2015.1065085
  • Bierwiaczonek, K., & Kunst, J. R. (2021). Revisiting the integration hypothesis: Correlational and longitudinal meta-analyses demonstrate the limited role of acculturation for cross-cultural adaptation. Psychological Science, 32(9), 1476–1493. https://doi.org/10.1177/09567976211006432
  • Borenstein, M., Cooper, H., Hedges, L., & Valentine, J. (2009). Effect sizes for continuous data. In H. Cooper, L. V. Hedges, & J. C. Valentine (Eds.), The handbook of research synthesis and meta-analysis (2nd ed., pp. 221–235). Russel Sage Foundation.
  • Bortolini, T., Newson, M., Natividade, J. C., Vázquez, A., & Gómez, A. (2018). Identity fusion predicts endorsement of pro-group behaviours targeting nationality, religion, or football in Brazilian samples. British Journal of Social Psychology, 57(2), 346–366. https://doi.org/10.1111/bjso.12235
  • Buhrmester, M. D., Burnham, D., Johnson, D. D., Curry, O. S., Macdonald, D. W., & Whitehouse, H. (2018). How moments become movements: Shared outrage, group cohesion, and the lion that went viral. Frontiers in Ecology and Evolution, 6, 54. https://doi.org/10.3389/fevo.2018.00054
  • Buhrmester, M. D., Fraser, W. T., Lanman, J. A., Whitehouse, H., & Swann, W. B. (2015). When terror hits home: Identity fused Americans who saw Boston bombing victims as “family” provided aid. Self and Identity, 14(3), 253–270. https://doi.org/10.1080/15298868.2014.992465
  • Buhrmester, M. D., Gómez, Á., Brooks, M. L., Morales, J. F., Fernández, S., & Swann, W. B. (2012). My group’s fate is my fate: Identity-fused Americans and Spaniards link personal life quality to outcome of 2008 elections. Basic and Applied Social Psychology, 34(6), 527–533. https://doi.org/10.1080/01973533.2012.732825
  • Carbonell, P., Rodríguez-escudero, A. I., & Pujari, D. (2009). Customer involvement in new service development: An examination of antecedents and outcomes. Journal of Product Innovation Management, 26(5), 536–550. https://doi.org/10.1111/j.1540-5885.2009.00679.x
  • Carnes, N. C., & Lickel, B. (2018). Moral binding: How emotions, convictions, and identity fusion shape progroup behavior. Self and Identity, 17(5), 549–573. https://doi.org/10.1080/15298868.2018.1451362
  • Ellemers, N., Kortekaas, P., & Ouwerkerk, J. W. (1999). Self-categorisation, commitment to the group and group self-esteem as related but distinct aspects of social identity. European Journal of Social Psychology, 29(2–3), 371–389. https://doi.org/10.1002/(SICI)1099-0992(199903/05)29:2/3<371::AID-EJSP932>3.0.CO;2-U
  • Ferguson, N., & McAuley, J. W. (2020). Staying engaged in terrorism: Narrative accounts of sustaining participation in violent extremism. Frontiers in Psychology, 11, 1338. https://doi.org/10.3389/fpsyg.2020.01338
  • Fisher, Z., Bollen, K., Gates, K., & Rönkkö, M. (2023). Miivsem: Model implied instrumental variable (MIIV) estimation of structural equation models. R package, 1–22. https://cran.r-project.org/web/packages/MIIVsem/index.html
  • Fisher, Z., & Tipton, E. (2015). Robumeta: An R-package for robust variance estimation in meta-analysis (Preprint ed.). https://doi.org/10.48550/arXiv.1503.02220
  • Foot, P. (1967). The problem of abortion and the doctrine of the double effect. Oxford Review, 5, 5–15 .
  • Fredman, L. A., Bastian, B., & Swann, W. B. (2017). God or country? Fusion with Judaism predicts desire for retaliation following Palestinian stabbing Intifada. Social Psychological and Personality Science, 8(8), 882–887. https://doi.org/10.1177/1948550617693059
  • Fredman, L. A., Buhrmester, M. D., Gómez, A., Fraser, W. T., Talaifar, S., Brannon, S. M., & Swann, W. B., Jr. (2015). Identity fusion, extreme pro-group behavior, and the path to defusion. Social and Personality Psychology Compass, 9(9), 468–480. https://doi.org/10.1111/spc3.12193
  • Gómez, Á., Atran, S., Chinchilla, J., Vázquez, A., López-Rodríguez, L., Paredes, B., Martínez, M., Blanco, L., Alba, B., Bautista, H., Fernández, S., Pozuelo-Rubio, F., González-Álvarez, J. L., Chiclana, S., Valladares-Narganes, H., Alonso, M., Ruíz-Alvarado, A., López-Novo, J. L., & Davis, R. (2022). Willingness to sacrifice among convicted Islamist terrorists versus violent gang members and other criminals. Scientific Reports, 12(1), 2596. https://doi.org/10.1038/s41598-022-06590-0
  • Gómez, Á., Bélanger, J., Chinchilla, J., Vázquez, A., Schumpe, B., Nisa, C., & Chiclana, S. (2021). Admiration for Islamist groups encourages self-sacrifice through identity fusion. Humanities and Social Sciences Communications, 8(1), 1–12. https://doi.org/10.1057/s41599-021-00734-9
  • Gómez, Á., Brooks, M. L., Buhrmester, M. D., Vázquez, A., Jetten, J., & Swann, W. B. (2011a). On the nature of identity fusion: Insights into the construct and a new measure. Journal of Personality and Social Psychology, 100(5), 918–933. https://doi.org/10.1037/a0022642
  • Gómez, Á., Chiclana, S., Chinchilla, J., Blanco, L., Alba, B., Bautista, H., & Pozuelo-Rubio, F. (2022). The mirage of the jihad. Disenchantment as the pathway to disengagement of female jihadists. A case study about radicalization in Spanish prisons. International Journal of Social Psychology, 37(3), 586–627. https://doi.org/10.1080/02134748.2022.2096254
  • Gómez, Á., Chinchilla, J., Vázquez, A., López-rodríguez, L., Paredes, B., & Martínez, M. (2020). Recent advances, misconceptions, untested assumptions, and future research agenda for identity fusion theory. Social and Personality Psychology Compass, 14(6). https://doi.org/10.1111/spc3.12531
  • Gómez, Á., López-Rodríguez, L., Sheikh, H., Ginges, J., Wilson, L., Waziri, H., Vázquez, A., Davis, R., & Atran, S. (2017). The devoted actor’s will to fight and the spiritual dimension of human conflict. Nature Human Behaviour, 1(9), 673–679. https://doi.org/10.1038/s41562-017-0193-3
  • Gómez, Á., Morales, J. F., Hart, S., Vázquez, A., & Swann, W. B., Jr. (2011b). Rejected and excluded forevermore, but even more devoted: Irrevocable ostracism intensifies loyalty to the group among identity-fused persons. Personality & Social Psychology Bulletin, 37(12), 1574–1586. https://doi.org/10.1177/0146167211424580
  • Gómez, Á., & Vázquez, A. (2015). The power of ‘feeling one’ with a group: Identity fusion and extreme pro-group behaviours/El poder de ‘sentirse uno’ con un grupo: Fusión de la identidad y conductas progrupales extremas. Revista De Psicologia Social, 30(3), 481–511. https://doi.org/10.1080/02134748.2015.1065089
  • Gómez, Á., Vázquez, A., López-Rodríguez, L., Talaifar, S., Martínez, M., Buhrmester, M. D., & Swann, W. B. (2019). Why people abandon groups: Degrading relational vs collective ties uniquely impacts identity fusion and identification. Journal of Experimental Social Psychology, 85, 103853. https://doi.org/10.1016/j.jesp.2019.103853
  • Hamid, N., Pretus, C., Atran, S., Crockett, M. J., Ginges, J., Sheikh, H., Tobeña, A., Carmona, S., Gómez, A., Davis, R., & Vilarroya, O. (2019). Neuroimaging ‘will to fight’for sacred values: An empirical case study with supporters of an Al Qaeda associate. Royal Society Open Science, 6(6), 181585. https://doi.org/10.1098/rsos.181585
  • Hedges, L. V., Tipton, E., & Johnson, M. C. (2010). Robust variance estimation in meta-regression with dependent effect size estimates. Research Synthesis Methods, 1(1), 39–65. https://doi.org/10.1002/jrsm.5
  • Heger, A. K., & Gaertner, L. (2018). Testing the identity synergy principle: Identity fusion promotes self and group sacrifice. Self and Identity, 17(5), 487–499. https://doi.org/10.1080/15298868.2017.1422538
  • Heger, A. K., Voorhees, V. A., Porter, B., & Gaertner, L. (2022). Does identity fusion moderate the motivational primacy of the individual self? Social Psychological and Personality Science, 19485506221141144. https://doi.org/10.1177/19485506221141144
  • Henrich, J., Heine, S. J., & Norenzayan, A. (2010). Beyond WEIRD: Towards a broad-based behavioral science. The Behavioral and Brain Sciences, 33(2–3), 111–135. https://doi.org/10.1017/S0140525X10000725
  • Hogg, M. A. (2014). From uncertainty to extremism: Social categorization and identity processes. Current Directions in Psychological Science, 23(5), 338–342. https://doi.org/10.1177/0963721414540168
  • Hornsey, M. J. (2008). Social identity theory and self-categorization theory: A historical review. Social and Personality Psychology Compass, 2(1), 204–222. https://doi.org/10.1111/j.1751-9004.2007.00066.x
  • Ioannidis, J. P. A. (2008). Interpretation of tests of heterogeneity and bias in meta-analysis. Journal of Evaluation in Clinical Practice, 14(5), 951–957. https://doi.org/10.1111/j.1365-2753.2008.00986.x
  • Jasko, K., LaFree, G., Piazza, J., & Becker, M. H. (2022). A comparison of political violence by left-wing, right-wing, and Islamist extremists in the United States and the world. Proceedings of the National Academy of Sciences, 119(30), e2122593119. https://doi.org/10.1073/pnas.2122593119
  • Jetten, J., & Mols, F. (2021). Support for populist parties: Economic deprivation, cultural backlash, or status anxiety? In J.-W. van Prooijen (Ed.), The psychology of political polarization (pp. 97–111). Routledge.
  • Jiménez, J., Gómez, Á., Buhrmester, M. D., Vázquez, A., Whitehouse, H., & Swann, W. B. (2016). The dynamic identity fusion index. Social Science Computer Review, 34(2), 215–228. https://doi.org/10.1177/0894439314566178
  • Joo, M., & Park, S. W. (2017). Effect of identity fusion on decision to make extreme sacrifices in romantic relationships: The moderating role of impulsiveness. British Journal of Social Psychology, 56(4), 819–827. https://doi.org/10.1111/bjso.12218
  • Kavanagh, C. M., Jong, J., McKay, R., & Whitehouse, H. (2019). Positive experiences of high arousal martial arts rituals are linked to identity fusion and costly pro-group actions. European Journal of Social Psychology, 49(3), 461–481. https://doi.org/10.1002/ejsp.2514
  • Klein, J. W., & Bastian, B. (2022). The fusion-secure base hypothesis. Personality and Social Psychology Review, 0(0), 108886832211008. https://doi.org/10.1177/10888683221100883
  • Kohl, C., McIntosh, E. J., Unger, S., Haddaway, N. R., Kecke, S., Schiemann, J., & Wilhelm, R. (2018). Online tools supporting the conduct and reporting of systematic reviews and systematic maps: A case study on CADIMA and review of existing tools. Environmental Evidence, 7(1), 8. https://doi.org/10.1186/s13750-018-0115-5
  • Kossakowski, R., & Besta, T. (2018). Football, conservative values, and a feeling of oneness with the group: A study of Polish football fandom. East European Politics and Societies: And Cultures, 32(4), 866–891. https://doi.org/10.1177/0888325418756991
  • Kunst, J. R., Boos, B., Kimel, S. Y., Obaidi, M., Shani, M., & Thomsen, L. (2018). Engaging in extreme activism in support of others’ political struggles: The role of politically motivated fusion with out-groups. PLoS One, 13(1), e0190639. https://doi.org/10.1371/journal.pone.0190639
  • Kunst, J. R., Dovidio, J. F., & Thomsen, L. (2019). Fusion with political leaders predicts willingness to persecute immigrants and political opponents. Nature Human Behavior, 3(11), 1180–1189. https://doi.org/10.1038/s41562-019-0708-1
  • Kunst, J. R., Fischer, R., Sidanius, J., & Thomsen, L. (2017). Preferences for group dominance track and mediate the effects of macro-level social inequality and violence across societies. Proceedings of the National Academy of Sciences, 114(21), 5407–5412. https://doi.org/10.1073/pnas.1616572114
  • Leach, C. W., van Zomeren, M., Zebel, S., Vliek, M. L. W., Pennekamp, S. F., Doosje, B., Ouwerkerk, J. W., & Spears, R. (2008). Group-level self-definition and self-investment: A hierarchical (multicomponent) model of in-group identification. Journal of Personality and Social Psychology, 95(1), 144–165. https://doi.org/10.1037/0022-3514.95.1.144
  • Mael, F., & Ashforth, B. E. (1992). Alumni and their alma mater: A partial test of the reformulated model of organizational identification. Journal of Organizational Behavior, 13(2), 103–123. https://doi.org/10.1002/job.4030130202
  • Newson, M. (2017). Football, fan violence, and identity fusion. International Review for the Sociology of Sport, 54(4), 431–444. https://doi.org/10.1177/1012690217731293
  • Newson, M., Bortolini, T., Buhrmester, M., da Silva, S. R., da Aquino, J. N. Q., & Whitehouse, H. (2018). Brazil’s football warriors: Social bonding and inter-group violence. Evolution and Human Behavior, 39(6), 675–683. https://doi.org/10.1016/j.evolhumbehav.2018.06.010
  • Page, M. J., McKenzie, J. E., Bossuyt, P. M., Boutron, I., Hoffmann, T. C., Mulrow, C. D., Shamseer, L., Tetzlaff, J. M., Akl, E. A., Brennan, S. E., Chou, R., Glanville, J., Grimshaw, J. M., Hróbjartsson, A., Lalu, M. M., Li, T., Loder, E. W., Mayo-Wilson, E., McDonald, S. … Moher, D. (2021). The PRISMA 2020 statement: An updated guideline for reporting systematic reviews. The BMJ, 372, n71. https://doi.org/10.1136/bmj.n71
  • Paredes, B., Briñol, P., & Gómez, Á. (2018). Identity fusion leads to willingness to fight and die for the group: The moderating impact of being informed of the reasons behind other members’ sacrifice. Self and Identity, 17(5), 517–530. https://doi.org/10.1080/15298868.2017.1419503
  • Paredes, B., Santos, D., Briñol, P., Gómez, Á., & Petty, R. E. (2019). The role of meta-cognitive certainty on the relationship between identity fusion and endorsement of extreme pro-group behavior. Self and Identity, 19(7), 804–824. https://doi.org/10.1080/15298868.2019.1681498
  • Peterson, R. A., & Brown, S. P. (2005). On the use of beta coefficients in meta-analysis. The Journal of Applied Psychology, 90(1), 175. https://doi.org/10.1037/0021-9010.90.1.175
  • Postmes, T., Haslam, S. A., & Jans, L. (2013). A single-item measure of social identification: Reliability, validity, and utility. British Journal of Social Psychology, 52(4), 597–617. https://doi.org/10.1111/bjso.12006
  • Pretus, C., Hamid, N., Sheikh, H., Gómez, Á., Ginges, J., Tobeña, A., Davis, R., Vilarroya, O., & Atran, S. (2019). Ventromedial and dorsolateral prefrontal interactions underlie will to fight and die for a cause. Social Cognitive and Affective Neuroscience, 14(6), 569–577. https://doi.org/10.1093/scan/nsz034
  • Pustejovsky, J. E., & Rodgers, M. A. (2019). Testing for funnel plot asymmetry of standardized mean differences. Research Synthesis Methods, 10(1), 57–71. https://doi.org/10.1002/jrsm.1332
  • Schubert, T. W., & Otten, S. (2002). Overlap of self, ingroup, and outgroup: Pictorial measures of self-categorization. Self and Identity, 1(4), 353–376. https://doi.org/10.1080/152988602760328012
  • Sheikh, H., Gómez, Á., & Atran, S. (2016). Empirical evidence for the devoted actor model. Current Anthropology, 57(S13), S204–209. https://doi.org/10.1086/686221
  • Sidanius, J., & Pratto, F. (2001). Social dominance: An intergroup theory of social hierarchy and oppression. Cambridge University Press.
  • Simon, B., & Garbow, O. (2010). The politicization of migrants: Further evidence that politicized collective identity is a dual identity. Political Psychology, 31(5), 717–738. https://doi.org/10.1111/j.1467-9221.2010.00782.x
  • Stanley, T. D. (2017). Limitations of PET-PEESE and other meta-analysis methods. Social Psychological and Personality Science, 8(5), 581–591. https://doi.org/10.1177/1948550617693062
  • Steffens, N. K., Schuh, S. C., Haslam, S. A., Pérez, A., & Dick, R. (2015). ‘Of the group’ and ‘for the group’: How followership is shaped by leaders’ prototypicality and group identification. European Journal of Social Psychology, 45, 180–190.
  • Swann, W. B., & Buhrmester, M. D. (2015). Identity fusion. Current Directions in Psychological Science, 24(1), 52–57. https://doi.org/10.1177/0963721414551363
  • Swann, W. B., Buhrmester, M. D., Gómez, A., Jetten, J., Bastian, B., Vázquez, A., Ariyanto, A., Besta, T., Christ, O., Cui, L., Finchilescu, G., Gonzalez, R., Goto, N., Hornsey, M., Sharma, S., Susianto, H., & Zhang, A. (2014). What makes a group worth dying for? Identity fusion fosters perception of familial ties, promoting self-sacrifice. Journal of Personality and Social Psychology, 106(6), 912–926. https://doi.org/10.1037/a0036089
  • Swann, W. B., Gómez, A., Buhrmester, M. D., Lopez-Rodriguez, L., Jimenez, J., & Vázquez, A. (2014). Contemplating the ultimate sacrifice: Identity fusion channels pro-group affect, cognition, and moral decision making. Journal of Personality and Social Psychology, 106(5), 713–727. https://doi.org/10.1037/a0035809
  • Swann, W. B., Jr., Gómez, A., Dovidio, J. F., Hart, S., & Jetten, J. (2010). Dying and killing for one’s group: Identity fusion moderates responses to intergroup versions of the trolley problem. Psychological Science, 21(8), 1176–1183. https://doi.org/10.1177/0956797610376656
  • Swann, W. B., Jr., Gómez, A., Seyle, D. C., Morales, J. F., & Huici, C. (2009). Identity fusion: The interplay of personal and social identities in extreme group behavior. Journal of Personality and Social Psychology, 96(5), 995–1011. https://doi.org/10.1037/a0013668
  • Swann, W. B., Gómez, Á., Vázquez, A., Guillamón, A., Segovia, S., & Carillo, B. (2015). Fusion with the cross-gender group predicts genital sex reassignment surgery. Archives of Sexual Behavior, 44(5), 1313–1318. https://doi.org/10.1007/s10508-014-0470-4
  • Swann, W. B., Jetten, J., Gómez, A., Whitehouse, H., & Bastian, B. (2012). When group membership gets personal: A theory of identity fusion. Psychological Review, 119(3), 441–456. https://doi.org/10.1037/a0028589
  • Tajfel, H., Turner, J. C., Austin, W. G., & Worchel, S. (1979). An integrative theory of intergroup conflict. In M. J. Hatch & M. Schultz (Eds.), Organizational identity: A reader (pp. 56–65). Oxford University Press.
  • Talaifar, S., & Swann, W. B. (2019). Deep alignment with country shrinks the moral gap between conservatives and liberals. Political Psychology, 40(3), 657–675. https://doi.org/10.1111/pops.12534
  • Tanner-Smith, E. E., & Tipton, E. (2014). Robust variance estimation with dependent effect sizes: Practical considerations including a software tutorial in Stata and SPSS. Research Synthesis Methods, 5(1), 13–30. https://doi.org/10.1002/jrsm.1091
  • Triandis, H. (1988). Collectivism v. Individualism: A reconceptualisation of a basic concept in cross-cultural social psychology. In G. K. Verma & C. Bagley (Eds.), Cross-cultural studies of personality, attitudes and cognition (pp. 60–95). Palgrave Macmillan UK. https://doi.org/10.1007/978-1-349-08120-2_3
  • Turner, J. C., Hogg, M. A., Oakes, P. J., Reicher, S. D., & Wetherell, M. S. (1987). Rediscovering the social group: A self-categorization theory. Basil Blackwell.
  • van Zomeren, M., Postmes, T., & Spears, R. (2008). Toward an integrative social identity model of collective action: A quantitative research synthesis of three socio-psychological perspectives. Psychological Bulletin, 134(4), 504–535. https://doi.org/10.1037/0033-2909.134.4.504
  • Van Zomeren, M., Spears, R., Fischer, A. H., & Leach, C. W. (2004). Put your money where your mouth is! Explaining collective action tendencies through group-based anger and group efficacy. Journal of Personality and Social Psychology, 87(5), 649. https://doi.org/10.1037/0022-3514.87.5.649
  • Vázquez, A., Gómez, Á., Ordoñana, J. R., & Paredes, B. (2015). From interpersonal to extended fusion: relationships between fusion with siblings and fusion with the country/Desde la fusión interpersonal a la fusión extendida: Relaciones entre la fusión con los hermanos y la fusión con el país. Revista De Psicologia Social, 30(3), 512–530. https://doi.org/10.1080/02134748.2015.1093755
  • Vázquez, A., Gómez, Á., Ordoñana, J. R., Swann, W. B., & Whitehouse, H. (2017). Sharing genes fosters identity fusion and altruism. Self and Identity, 16(6), 684–702. https://doi.org/10.1080/15298868.2017.1296887
  • Vázquez, A., Ordoñana, J. R., Whitehouse, H., & Gómez, Á. (2019). Why die for my sibling? The positive association between identity fusion and imagined loss with endorsement of self-sacrifice/¿por qué morir por un hermano? La asociación positiva entre la fusión de identidad y la pérdida imaginada con la disposición al autosacrificio. Revista De Psicologia Social, 34(3), 413–438. https://doi.org/10.1080/02134748.2019.1639343
  • Vignoles, V. L. (2018). Identity: Personal and social. In K. Deaux & M. Snyder (Eds.), The Oxford handbook of personality and social psychology (pp. 289–315). Oxford University Press.
  • Whitehouse, H. (2018). Dying for the group: Towards a general theory of extreme self-sacrifice. The Behavioral and Brain Sciences, 41, e192. https://doi.org/10.1017/S0140525X18000249
  • Whitehouse, H., Jong, J., Buhrmester, M. D., Gómez, A., Bastian, B., Kavanagh, C. M., Newson, M., Matthews, M., Lanman, J. A., McKay, R., & Gavrilets, S. (2017). The evolution of extreme cooperation via shared dysphoric experiences. Scientific Reports, 7(1), 44292. https://doi.org/10.1038/srep44292
  • Whitehouse, H., McQuinn, B., Buhrmester, M., & Swann, W. B. (2014). Brothers in arms: Libyan revolutionaries bond like family. Proceedings of the National Academy of Sciences, 111(50), 17783–17785. https://doi.org/10.1073/pnas.1416284111
  • White, F. A., Newson, M., Verrelli, S., & Whitehouse, H. (2021). Pathways to prejudice and outgroup hostility: Group alignment and intergroup conflict among football fans. Journal of Applied Social Psychology, 51(7), 660–666. https://doi.org/10.1111/jasp.12773
  • Wilkinson, R. (2005). The impact of inequality. The New Press.
  • Wolfowicz, M., Litmanovitz, Y., Weisburd, D., & Hasisi, B. (2021). Cognitive and behavioral radicalization: A systematic review of the putative risk and protective factors. Campbell Systematic Reviews, 17(3), e1174. https://doi.org/10.1002/cl2.1174