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Noya Kislev, Graduate student

I am a PhD student in social psychology at the IDC Herzliya, supervised by Tamar Saguy. I received my B.A. in Psychology and M.A. in Social Psychology from IDC Herzliya. My research interests include gender stereotypes, gender development among children and gender-typing processes induced by parents, environment and culture. In particular, I am interested in effective ways to change gender-typing of children. 

Hanna Szekeres, Graduate Student

My general research interests are different aspects of intergroup relations, particularly involving groups in conflict (e.g., the Israeli-Palestinian conflict), minority and majority members in a society (e.g., the Roma and non-Roma in Eastern Europe, African Americans or Muslims and Whites in the U.S.), or gender norms. In my dissertation research, I investigate the psychological and intergroup processes that underlie the phenomenon of witnessing and (not) confronting prejudice and discrimination as a bystander.



Szekeres, H., Shuman, E., & Saguy, T. (2020). Views of sexual assault following# MeToo: The role of gender and individual differences. Personality and Individual Differences, 166, 110203.


Szekeres, H., Halperin, E., Kende, A., & Saguy, T. (2019). The effect of moral loss and gain mindset on confronting racism. Journal of Experimental Social Psychology, 84, 103833.


Bruneau, E., Szekeres, H., Kteily, N., Tropp, L. R., & Kende, A. (2019). Beyond dislike: Blatant dehumanization predicts teacher discrimination even (and especially) among teachers low in prejudice. Group Processes and Intergroup Relations, 23(4), 560-577.


Saguy, T., & Szekeres, H. (2018). Changing Minds via Collective Action: Exposure to the 2017 Women's March Predicts Over-time Decrease in (Some) Men's Gender System Justification. Group Processes & Intergroup Relations, 21(5), 678-689.

Saguy, T., Szekeres, H., Nouri, R., Goldenberg, A., Doron, G., Dovidio, J. F., ... & Halperin, E. (2015). Awareness of intergroup help can rehumanize the out-group. Social Psychological and Personality Science, 6(5), 551-558.

Siwar Aslih, Graduate Student

I am currently a Ph.D student at the University of Groningen and the IDC Herzliya, supervised by Martijn van Zomeren, Eran Halperin and Tamar Saguy. I received my dual-major B.A. in Psychology and Educational counseling and my M.A. in group counseling from University of Haifa. My main areas of interest are collective action, power relations embedded in intergroup conflicts, and collective emotions and beliefs. My PhD project investigates emotions and emotion regulation in collective action in the context of intractable conflicts with a power relations perspective.

Aharon Levy, Post-doctoral fellow

Aharon Levy is a Research and Teaching Fellow at the Columbia Business School Management division. Aharon's research examines psychology as a means for the promotion of social change. Specifically, Aharon studies the potential of Gateway Groups to improve intergroup relations, and the development of psychological interventions for intergroup conflict resolution. Additionally, Aharon also studies the role information plays in distributive negotiations. Apart from his research, Aharon also teaches courses on psychology & social change, and consults organizations in the field of intergroup relations.



  • Levy, A., Halperin, E., Van Zomeren, M., & Saguy, T. (in press) Inter racial gateways: The potential of biracials to reduce threat and prejudice in inter racial dynamics. Race and Social Problems.

  • Levy, A. & Maaravi, Y. (2018) The boomerang effect of psychological interventions. Social influence, 13(1), 39-51.

  • Levy, A., Saguy, T., Van Zomeren, M., & Halperin, E. (2017) Ingroups, outgroups, and the gateway groups between: The potential of dual identities to improve intergroup relations. Journal of Experimental Social Psychology, 70, 260-271. 

  • Levy, A., Saguy, T., Halperin, E., & Van Zomeren, M. (2017) Bridges or barriers? Conceptualization of the role of multiple identity gateway groups in intergroup relations. Frontiers in Psychology. 8,  1097-1117.

  • Levy, A., van Zomeren, M., Saguy, T., & Halperin, E. (2017). Intergroup emotions and gateway groups: Introducing multiple social identities into the study of emotions in conflict. Social and Personality Psychology Compass, 11(6), 1-15.

  • Maaravi, Y.  & Levy, A. (2017) When your anchor sinks your boat: Information asymmetry in distributive negotiations and the disadvantage of making the first offer. Judgment and Decision Making, 12(5), 420-429.

  • Halperin, E. & Levy, A. (2017). Intractable Conflicts. In F. M. Moghaddam (Ed). The Sage Encyclopedia of Political Behavior, pp. 406-408, Sage.    

Eric Shuman, Phd Student

I am a PhD student in social psychology at the University of Groningen supervised by Tamar Saguy, Eran Halperin, and Martijn van Zomeren. I received a B.S. in Psychology and a B.A. in Global Politics from Washington and Lee University in 2014, and completed my M.A. in Social Psychology at the IDC Herzliya. My research interests include collective action and emotions, and power relations in conflict. In particular, I am interested in different types of collective action (e.g. nonviolent, nonnormative, violent). My research examines psychological factors that promote support for these types of action, but also the effects and effectiveness of these types of action at motivating the high power group to address inequality and pursue conflict resolution. [personal page]




Shuman, E., Saguy, T., van Zomeren, M., Halperin, E. (in press). Disrupting the System Constructively: Testing the Effectiveness of Nonnormative Nonviolent Collective Action. Journal of Personality and Social Psychology.


Szerkes, H., Shuman, E., Saguy, T. (in press). Views of Sexual Assault Following #MeToo: The Role of Gender and Individual Differences. Personality and Individual Differences.


Hasan-Aslih, S.*, Shuman, E.*, Pliskin, R., Saguy, T., van Zomeren, Halperin, E. (2020). With or Without You: The Role of Identification in Predicting Joint and Ingroup Collective Action in Intergroup Conflict. European Journal of Social Psychology.


Hasan-Aslih, S., Shuman, E., Goldenberg, A., Pliskin, R., van Zomeren, Halperin, E. (2020). The Quest for Hope: Disadvantaged Group Members Can Fulfill Their Desire to Feel Hope, but only when They Believe in Their Power. Social and Personality Psychology Science.


Shuman, E., Johnson, D., Saguy, T., Halperin, E. (2018). Threat to the Group's Image Can Motivate High Identifiers to take Action Against Ingroup Transgressions. Personality and Social Psychology Bulletin.


Shuman, E., Halperin, E., & Reifen Tagar, M. (2018). Can Anger Lead to Conflict Resolution? Redirecting Anger Responses to Promote Peace. Group Processes and Intergroup Relations.


Shuman, E., Cohen-Chen, S., Hirsch-Hoefler, S., & Halperin, E. (2016). Explaining Normative versus Non-Normative Action: The Role of Implicit Theories. Political Psychology.

Nechumi Yaffe (Alumni)

Nechumi Yaffe is a faculty member in the Department of Public Policy at Tel Aviv University. She completed her postdoctoral research at Princeton University affiliated with the Daniel Kahneman Center of Behavioral Science and Public Policy, and the University Center for Human Values. Nechumi’s research examines, from a social psychology perspective, how identity, social norms, and authority play a role in creating and preserving poverty. Her work focuses on the ultra-orthodox (Haredi) community in Israel and USA. Before entering her doctoral program, she was an advisor for the Haredi educational system she wrote the new curriculum in history and the history textbook used by all Israeli Haredi high schools. Nechumi earned a Ph.D. in political science from the Hebrew University in Jerusalem. supervised by Avner de-Shalit, Eran Halperin and Tamar Saguy. 


Yaffe, N., McDonald, M., Halperin, E., & Saguy, T. (2018,). God Sex and Money among the ultra-Orthodox in Israel: An Integrated Sociocultural and Evolutionary Perspective. Evolution and Human Behavior 

Gantman, A., Gomila, R., Martinez, J., Nathan Matias, N., Levy Paluck, E. Jordan Starck,J. Wu,S. and Yaffe, N.* (2018, forthcoming) A pragmatist philosophy of psychological science and its implications for replication; Behavioral and Brain Sciences.  

Yaffe, N., Solak, N., Halperin, E., & Saguy, T. (2018). Poor is Pious: Distinctiveness Threat Increases Glorification of Poverty among the Poor. European Journal of Social Psychology. Vol. 48, pp. 460-471


Yaffe, N. (2020). Is there a universal notion of capabilities? The Case of the Ultra-Orthodox Community in Israel. Journal of Human Development and Capabilities

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