Lab Members | Social Decision Making Lab

Prof. Shoham Choshen-Hillel

Lab Director

shoham@huji.ac.il

I am an associate professor of organizational behavior at the Hebrew University Business School and the Federmann Center for the Study of Rationality at the Hebrew University. I serve as an associate editor at Management Science and as the vice dean for teaching affairs at the Hebrew University Business School.

I am the proud director of the “Decision making lab” at the Hebrew University.

I completed my PhD in social psychology in 2013 at the Hebrew University. I have been a visiting scholar (2022-2023) and a postdoctoral fellow (2013-2105) at the Roman Family Center for Decision Research at Booth School of Business, University of Chicago.

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Mika Guzikevits

PhD Student

mika.guzikevits@gmail.com

I am a social psychologist and Ph.D. candidate at the Hebrew University Business School and the Federmann Center for the Study of Rationality, supervised by Shoham Choshen-Hillel. I received my B.A. in Psychology and Business Management, my M.A. in Social Psychology, and my M.B.A., all from the Hebrew University of Jerusalem.

My research focuses on the social aspects of dishonest behavior, particularly how social image—how we are perceived and judged by others—affects different types of lies. I am also deeply interested in healthcare-related decision-making and the biases that influence these processes.

In addition to my research, I teach Organizational Behavior to B.A. and M.B.A. students at the Hebrew University.

Selected Publications

- Guzikevits, M., Gordon-Hecker, T., Rechtman, D., Salameh, S., Israel, S., Shayo, M., Gozal, D., Perry, A., Gileles, A., & Choshen-Hillel, S. (2024). Sex bias in pain management decisions. Proceedings of the National Academy of Sciences, 121(33), e2401331121.

- Guzikevits, M., & Choshen-Hillel, S. (2022). The optics of lying: How pursuing an honest social image shapes dishonest behavior. Current Opinion in Psychology, 101384.

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Hadar Naftalovich

Postdoctoral Fellow

hadar.naftalovich@mail.huji.ac.il

I am a Postdoctoral Fellow in the Social Decision Making Lab at the Hebrew University Business School and the Hebrew University Faculty of Medicine under the co-supervision of Shoham Chosen-Hillel and Alex Gileles-Hillel. My postdoctoral research will focus on the impact of war on civilian sleep schedules and how disrupted sleep impacts empathy.

I received my Ph.D. and my M.A. in Clinical Psychology from the Hebrew University of Jerusalem, and my B.A. in psychology and visual arts from Emory University.

My research focuses on bettering our understanding of how psychopathological symptoms fluctuate and the potential mechanisms that may underlie these fluctuations. Specifically, my research has focused on how chronotype (whether you are an early bird, a night owl, or somewhere in between), sleep, and inhibition predict symptom fluctuations in individuals with obsessive-compulsive disorder. I explore the hypothesis that symptoms are less severe during optimal times of day based on chronotype (e.g., morning for morning types) and that the mechanism behind this is improved alertness which leads to better inhibitory control.

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Yair Nahari

PhD Student

yair.nahari@mail.huji.ac.il

I am a doctoral student at the Hebrew University Business School and the Federmann Center for the Study of Rationality, both at the Hebrew University of Jerusalem.

I hold a bachelor's degree in Cognitive & Brain Sciences and Psychology, as well as a master's degree in Cognitive Science, all from the Hebrew University.

I am conducting my doctoral research under the mentorship of Prof. Shoham Choshen-Hillel and Prof. Ilan Yaniv. My research examines how people assess the overall harms or benefits to groups and how these evaluations shape policy decisions and perceptions of inequality. I am also interested in the balance between efficiency and equality in resource allocation, exploring solutions to these trade-offs and their limitations.

Publications

Choshen-Hillel, S., & Nahari, Y. (2024) The Dilemma of Dividing Five Candies Between Two Children. Frontiers for Young Minds, 11:1286330, 1-7. doi.org/10.3389/frym.2023.1286330

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