Marc W. Heerdink is an Assistant Professor in the Social Psychology department of the University of Amsterdam, and part of Emotions As Social Information lab (EASI lab).

He is also track ambassador for the Social Influence Master's track.

Research Interests

Marc's research focuses on understanding the interplay between emotional behavior and group dynamics. The majority of his research is concerned with affective processes within and between groups. For instance, several lines of research investigate how emotional influence shapes processes of convergence (e.g., conformity, norm transmission) and divergence (dissent, arguing) in groups. Another line of research concerns how affective processes shape group performance. Other current research interests include the development and consequences of group hierarchy, and emotional processes in immoral behavior. He combines traditional social-psychological methods with computational methods to advance the understanding of intra- and inter-group processes online and offline.

Academic background

• B.Sc. (2008) and M.Sc. (2010) in Social Psychology from the University of Amsterdam, Erasmus research internship in Dr. Luis Oceja's Lab at the Universidad Autónoma de Madrid
• Ph.D. (2015) from the University of Amsterdam, on a dissertation that focuses on the function and consequences of emotional reactions to deviance in small working groups and is titled Regulating Deviance with Emotions: Emotional Expressions as Signals of Acceptance and Rejection (University of Amsterdam).
• Postdoctoral fellowship with Prof. Gerben van Kleef (University of Amsterdam)
• NWO Rubicon postdoctoral fellowship in Prof. Miles Hewstone's Oxford Centre for the Study of Intergroup Conflict (OxCSIC, University of Oxford).

Other links

• EASI Lab

• Track ambassador for the Social Influence Master's track.
• Course "Groups and intergroup processes" (Bachelor Social Psychology)
• Supervision of BSc., MSc. and MSc.Res. thesis projects.

PhD supervision

• John Gallacher (University of Oxford) "Online intergroup conflict: How the dynamics of online communication drive extremism and violence between groups"; graduated Feb 2021
• Siyi Gu (University of Amsterdam) on the Emotional influence of Social Media Influencers (ongoing).

Publications

• Heerdink, M. W. & Homan, A. C. (in press). Anxious to perform: Compositional effects of negative task-related emotions in teams. Small Group Research.
• Wolf, S. A., Heerdink, M. W., & Van Kleef, G. A. (2023). A motivational account of convergence in emotion expressions within groups: The emotional conformity framework. Emotion Review. https://doi.org/10.1177/17540739231182241
• Fang, X., Sauter, D. A., Heerdink, M. W., & Van Kleef, G. A. (2022). Culture shapes the distinctiveness of posed and spontaneous facial expressions of anger and disgust, 
• Journal of Cross-Cultural Psychology, 5, 471-487. https://doi.org/10.1177/00220221221095208
• Lange, J., Heerdink, M. W., & Van Kleef, G. A. (2022). Reading emotions, reading people: Emotion perception and inferences drawn from perceived emotions. Current Opinion in Psychology, 43, 85-90. https://doi.org/10.1016/j.copsyc.2021.06.008
• Gallacher, J. D., Heerdink, M. W., & Hewstone, M. (2021). Online engagement between opposing political protest groups via social media is linked to physical violence of offline encounters. Social Media + Society, 7, 1-16. https://doi.org/10.1177/2056305120984445
• Van Kleef, G. A., Heerdink, M. W., Wanders, F., Stamkou, E., Cheshin, A., Koning, L. F., Fang, X., & Georgeac, O. (2021). No guts, no glory? How risk-taking shapes actors’ social power. Journal of Applied Psychology, 106, 1673–1694. https://doi.org/10.1037/apl0000868
• Gallacher, J. D., & Heerdink, M. W. (2019). Measuring the effect of Russian Internet Research Agency information operations in online conversations. Defence Strategic Communications, 6, 155-198. https://doi.org/10.30966/2018.riga.6 (alt link)
• Heerdink, M. W., Koning, L. F., Van Doorn, E. A., & Van Kleef, G. A. (2019). Emotions as guardians of group norms: Expressions of anger and disgust drive inferences about autonomy and purity violations. Cognition & Emotion, 33, 563-578. https://doi.org/10.1080/02699931.2018.1476324
• Oceja, L. V., Stocks, E., Heerdink, M. W., Villar, S., Salgado, S., Carrera, P., Arribas, M., Bargsted, M., Beramendi, M., Caballero, A., Espinosa, A., Escanés, G., Lima, L., Muñoz, D., Nájera, P., Pereira, S., Villegas, U., & Zubieta. E. (2018). Revisiting the difference between instrumental and terminal values to predict (stimulating) prosocial behaviours: The transcendental-change profile. British Journal of Social Psychology. https://doi.org/10.1111/bjso.12306
• Van Kleef, G. A., Heerdink, M. W., & Homan, A. C. (2017). Emotional influence in groups: The dynamic nexus of affect, cognition, and behavior. Current Opinion in Psychology, 17, 156-161. https://doi.org/10.1016/j.copsyc.2017.07.017
• Cheshin, A., Heerdink, M. W., Kossakowski, J. J., & Van Kleef, G. A., (2016). Pitching emotions: The interpersonal effects of emotions in baseball. Frontiers in Psychology, 7(178), 1-13. https://doi.org/10.3389/fpsyg.2016.00178
• Van Kleef, G. A., Van den Berg, H., & Heerdink, M. W. (2015). The persuasive power of emotions: Effects of emotional expressions on attitude formation and change. Journal of Applied Psychology, 100, 1124-1142. https://doi.org/10.1037/apl0000003
• Heerdink, M. W., Van Kleef, G. A., Homan, A. C., & Fischer, A. H. (2015). Emotional expressions as social signals of rejection and acceptance: Evidence from the Affect Misattribution Paradigm. Journal of Experimental Social Psychology, 56, 60-68.  https://doi.org/10.1016/j.jesp.2014.09.004
• Heerdink, M. W., Van Kleef, G. A., Homan, A. C., & Fischer, A. H. (2015). Emotional reactions to deviance in groups: The relation between number of angry reactions, felt rejection, and conformity. Frontiers in Psychology, 6(830), 1-12.  https://doi.org/10.3389/fpsyg.2015.00830
• Oceja, L. V., Heerdink, M. W., Stocks, E. L., Ambrona, T., López-Pérez, B., & Salgado, S. (2014). Empathy, awareness of others, and action: How feeling empathy for one-among-others motivates helping the others. Basic and Applied Social Psychology, 36, 111-124.  https://doi.org/10.1080/01973533.2013.856787
• Heerdink, M. W., Van Kleef, G. A., Homan, A. C., & Fischer, A. H. (2013). On the social influence of emotions in groups: Interpersonal effects of anger and happiness on conformity versus deviance. Journal of Personality and Social Psychology, 105, 262-284.  https://doi.org/10.1037/a0033362
• Van Kleef, G. A., Homan, A.C., Finkenauer, C., Blaker, N. M., & Heerdink, M. W. (2012). Prosocial norm violations fuel power affordance. Journal of Experimental Social Psychology, 48, 937-942.  https://doi.org/10.1016/j.jesp.2012.02.022
• Van Doorn, E. A., Heerdink, M. W., & Van Kleef, G. A. (2012). Emotion and the construal of social situations: Inferences of cooperation versus competition from expressions of anger, happiness, and disappointment. Cognition & Emotion, 26, 442-461.  https://doi.org/10.1080/02699931.2011.648174
• Van Kleef, G. A., Van Doorn, E. A., Heerdink, M. W., & Koning, L. F. (2011). Emotion is for influence. European Review of Social Psychology,  22, 114-163.  https://doi.org/10.1080/10463283.2011.627192

Pre-prints

• Hao, R., Heerdink, M. W., Doosje, E. J., & Van Kleef, G. A. (2023). An investigation of how angry reactions to discrimination by different groups shape intergroup discrimination. PsyArXiv Preprints. https://psyarxiv.com/549uy/
• Gallacher, J. D., & Heerdink, M. W. (2021). Mutual radicalisation of opposing extremist groups via the Internet. PsyArXiv Preprints. https://psyarxiv.com/dtfc5/

Published Abstracts

• Heerdink, M. W., Van Kleef, G. A., Homan, A. C., & Fischer, A. H. (2012). Conformiteit aan een boze meerderheid: De relatie tussen emoties van een meerderheid, waargenomen acceptatie en conformiteit [Conformity to an angry majority: The relation between majority emotions, perceived acceptance, and conformity]. In N. van de Ven, M. Baas, L. van Dillen, D. Lakens, A. M. Lokhorst, & M. Strick (Eds.), Jaarboek Sociale Psychologie 2011 (pp. 71-73). Groningen: ASPO Pers.