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Book chapters

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Vollhardt, J.R., & Campbell-Obaid., M.* (in press). The social psychology of genocide and mass atrocities. In A. Miller (Ed.), The social psychology of good and evil (2nd ed.). Guilford Press.

Vollhardt, J.R. (in press). The role of social psychology in preventing group-selective mass atrocities. In T. Galis, S. Rosenberg, & A. Zucker (Eds.), Reconstructing atrocity prevention. Cambridge University Press.

Schroer-Hippel, M., Cohrs, J.C., & Vollhardt, J. R. (in press). Sozialpsychologische Friedens- und Konfliktforschung [Social psychological peace and conflict studies]. In O. Decker (Ed.), Sozialpsychologie und Sozialtheorie. [Social psychology and social theory]. Wiesbaden, Germany: VS-Verlag.

Vollhardt, J. R., Bilewicz, M., & Olechowski, M. (2015). Victims under siege: Lessons for Polish-Jewish relations and beyond. In K. Sharvit & E. Halperin (Eds.), The social psychology of intractable conflicts - celebrating the legacy of Daniel Bar-Tal, volume I (pp. 75-87). New York: Springer. 

Mazur, L., Nair, R., & Vollhardt, J. R. (2015). Dynamics of group and intergroup relations. In A. Dost-Gözkan & D. Sönmez Keith (Eds.), Norms, groups, conflict and social change: Rediscovering Muzafer Sherif’s Psychology (pp. 159-186). Piscataway, NJ: Transaction. 

Vollhardt, J.R. (2014). The question of legitimacy in studying collective trauma. In I. Maček (Ed.), Engaging violence: trauma, memory, and representation (pp. 74-90). New York, NY: Routledge. 

Vollhardt, J. R. (2012). Collective victimization. In L. Tropp (Ed.), Oxford handbook of intergroup conflict (pp. 136-157). New York, NY: Oxford University Press.

Bilewicz, M., & Vollhardt, J. R. (2012). Evil transformations: Psychological processes underlying genocide and mass killing. In A. Golec De Zavala & A. Cichocka (Eds.), Social psychology of social problems. The intergroup context (pp.  280 - 307). New York, NY: Palgrave Macmillan.

Groeben, N., & Vollhardt, J.R. (2012). Friedenspsychologie als zielorientierte Praxisforschung. Eine metatheoretisch-methodologische Kritik. In J. Rost & W. Baros (Eds.), Natur- und kulturwissenschaftliche Perspektiven in der Psychologie. Methodologie - Methoden - Anwendungsbeispiele (pp. 17 - 27). Berlin, Germany: Regener Verlag.

Vollhardt, J. R. (2012). Collective victimhood. In D. J. Christie (Ed.), Encyclopedia of Peace Psychology (pp. 1164-1167). Hoboken, NJ: Wiley-Blackwell.

Vollhardt, J. R. (2012). Social psychological peace research. In D. J. Christie (Ed.), Encyclopedia of Peace Psychology (pp. 1037 - 1041). Hoboken, NJ: Wiley-Blackwell.

Vollhardt, J. R. (2012). Tolerance for diverse groups. In D. J. Christie (Ed.), Encyclopedia of Peace Psychology (pp. 1117-1121). Hoboken, NJ: Wiley-Blackwell.

Shapiro, I., Bilali, R., & Vollhardt, J. (2009). Peace. In S. J. Lopez (Ed.), The encyclopedia of positive psychology, Vol. 2 (pp. 672-676). Oxford, UK: Wiley-Blackwell.

Vollhardt, J., & Migacheva, K., & Tropp, L. (2008). Social cohesion and tolerance for group differences. In J. de Rivera (Ed.), Handbook on building cultures of peace (pp. 139-152). Berlin, New York: Springer.

Vollhardt, J. (2004). Der Einfluss des Faktors Geschlecht auf die Filmpräferenz [The influence of gender on the preference of film genres]. In B. Boeckle & M. Ruf (Eds.), Eine Frage des Geschlechts. Ein Gender-Reader [The question of gender. A gender reader]. (pp. 207-219). Wiesbaden, Germany: Verlag für Sozialwissenschaften.