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Dr. A.R. (Allard) Feddes

Faculty of Social and Behavioural Sciences
Programme group Social Psychology
Photographer: Ed O'Mahony

Visiting address
  • Nieuwe Achtergracht 129
  • Room number: 2.30
Postal address
  • Postbus 15900
    1001 NK Amsterdam
Contact details
  • Profile

    Research Interests

    General interest: How does group membership influence our thinking (cognition), feeling (affect and emotions), and behaviour.

    Specific research themes:

    • Identity
    • Intergroup prejudice, stereotyping, discrimination
    • Radicalization, de-radicalization and terrorism
    • Populism
    • Evaluation of interventions


    Allard Feddes is an Assistant Professor of Social Psychology at the University of Amsterdam, the Netherlands. He has a PhD in Social Psychology (Friedrich-Schiller University of Jena, Germany, 2007) and a MSc. in Social and Organizational Psychology (University of Groningen, the Netherlands, 2004). Allard has also studied at Maynooth University (Ireland) and Simon Fraser University (Vancouver, Canada). He has worked as a post-doctoral researcher at ISCTE-Lisbon University Institute (Portugal) and the University of Milano-Bicocca (Italy). Allard is broadly interested in the question how group membership influences our thinking (cognition), feeling (affect and emotions) and doing (behaviour). His research includes topics such as intergroup prejudice, stereotyping and discrimination; antecedents and consequences of hate-crime; collective action; radicalization and terrorism and populism. In addition, Allard is interested in developing interventions (i.e., countering discrimination) and how to best show what works and and what not (evidence-based evaluation).



    Fundamentals of Psychology (Introduction course in Psychology, PPLE-Politics, Psychology, Law & Economics- Bachelor Programme)

    Emotions (PPLE Bachelor Programme)

    Political Psychology (PPLE Bachelor Programme)

    Intergroup Processes (Bachelor Programme, Department of Psychology)

    Current topics: Polarization (Bachelor Programme, Department of Psychology)


    Supervision of Bachelor and (Research) Master theses (Department of Psychology)

    Supervision of PhD students (Department of Psychology)


    Supervision of internships of Cultural Psychology and Social Influence Mastertrack students (Department of Psychology)

    Supervision of internships of Research Master students (Department of Psychology)

    Administrative tasks

    Chair of the Programme Committee of the Graduate School of Psychology 

  • Publications


    • Feddes, A. R., Nickolson, L., van Bergen, N. R. J., Mann, L., & Doosje, B. (2023). Extremist thinking and doing: A systematic literature study of empirical findings on factors associated with (de)radicalisation processes. International Journal of Developmental Science, 17(1-3), 7-18. Advance online publication. [details]
    • Groot Bruinderink, M. L., Boyd, A., & Feddes, A. R. (2023). Online-Mediated HIV Pre-exposure Prophylaxis Care and Reduced Monitoring Frequency for Men Who Have Sex With Men: Protocol for a Randomized Controlled Noninferiority Trial (EZI-PrEP Study). JMIR Research Protocols, 12.
    • van Bergen, D., Smit, A., & Feddes, A. R. (2023). Stigma, Depression, Suicidal Thoughts and Coping of Sexual Minority Youth Raised in Conservative Versus Mainstream Denominations of Christianity: A Mixed Method Study. Sexuality and Culture: An Interdisciplinary Journal, 27(3), 972-994. Advance online publication. [details]





    • Feddes, A. R., Huijzer, A., van Ooijen, I., & Doosje, B. (2019). Fortress of Democracy: Engaging Youngsters in Democracy Results in More Support for the Political System. Peace and Conflict : Journal of Peace Psychology, 25(2), 158-164. [details]
    • Reches, L. H. L., & Feddes, A. R. (2019). Similarity attracts: The role of personality in similarity perceptions and children's attitudes towards refugees. British Journal of Developmental Psychology, 37(4), 447-460. [details]
    • van Bergen, D. D., Wachter, G. G., & Feddes, A. R. (2019). Externalizing behaviours of Turkish-Dutch and Moroccan-Dutch youth: The role of parental cultural socialization. The European Journal of Developmental Psychology, 16(1), 18-31. Advance online publication. [details]


    • Macdougall, A. I., van der Veen, J., Feddes, A. R., Nickolson, L., & Doosje, B. (2018). Different Strokes for Different Folks: The Role of Psychological Needs and Other Risk Factors in Early Radicalisation. International Journal of Developmental Science, 12(1-2), 37-50. [details]



    • António, J. H., Correia, R., Feddes, A. R., & Morais, R. (2016). Creating a More Inclusive Society: Social-Developmental Research on Intergroup Relations in Childhood and Adolescence. In J. Vala, S. Waldzus, & M. M. Calheiros (Eds.), The social developmental construction of violence and intergroup conflict (pp. 197-218). Springer International Publishing. [details]
    • Doosje, B., Moghaddam, F. M., Kruglanski, A. W., de Wolf, A., Mann, L., & Feddes, A. R. (2016). Terrorism, radicalization, and de-radicalization. Current Opinion in Psychology, 11, 79-84. [details]
    • Mann, L., Feddes, A. R., Doosje, B., & Fischer, A. H. (2016). Withdraw or affiliate? The role of humiliation during initiation rituals. Cognition & Emotion, 30(1), 80-100. Advance online publication. [details]


    • Feddes, A. R., & Gallucci, M. (2015). A literature review on methodology used in evaluating effects of preventive and de-radicalisation interventions. Journal for Deradicalization, 5(4), 1-27. [details]
    • Feddes, A. R., Mann, L., & Doosje, B. (2015). Increasing self-esteem and empathy to prevent violent radicalization: a longitudinal quantitative evaluation of a resilience training focused on adolescents with a dual identity. Journal of Applied Social Psychology, 45(7), 400-411. [details]
    • van Bergen, D. D., Feddes, A. F., Doosje, B., & Pels, T. V. M. (2015). Collective identity factors and the attitude toward violence in defense of ethnicity or religion among Muslim youth of Turkish and Moroccan descent. International Journal of Intercultural Relations, 47, 89-100. [details]


    • Arriaga, P., Esteves, F., & Feddes, A. R. (2014). Looking at the (mis) fortunes of others while listening to music. Psychology of Music, 42(2), 251-268. Advance online publication. [details]
    • Feddes, A. R., Monteiro, M. B., & Justo, M. G. (2014). Subjective social status and intergroup attitudes among ethnic majority and minority children in Portugal. British Journal of Developmental Psychology, 32(2), 125-140. Advance online publication. [details]


    • Doosje, B., van den Bos, K., Loseman, A., Feddes, A. R., & Mann, L. (2012). "My in-group is superior!": susceptibility for radical right-wing attitudes and behaviors in Dutch youth. Negotiation and Conflict Management Research, 5(3), 253-268. [details]
    • Feddes, A. R., Mann, L., & Doosje, B. (2012). From extreme emotions to extreme actions: explaining non-normative collective action and reconciliation. Behavioral and Brain Sciences, 35(6), 432-433. [details]


    • Turner, R. N., & Feddes, A. R. (2011). How intergroup friendship works: a longitudinal study of friendship effects on outgroup attitudes. European Journal of Social Psychology, 41(7), 914-923. [details]


    • Feddes, A. R., Noack, P., & Rutland, A. (2009). Direct and extended friendship effects on minority and majority children’s intergroup attitudes: A Longitudinal Study. Child Development, 80(2), 377-390.




    • Feddes, A. R., Mann, L., & Doosje, B. (2013). Scientific Approach to Formulate Indicators & Responses to Radicalisation. Empirical study. SAFIRE. [details]
    • Marret, J. L., Feddes, A. R., Mann, L., Doosje, B., & Griffioen-Young, H. (2013). An overview of the SAFIRE project: a scientific approach to finding indicators of and responses to radicalisation. Journal EXIT-Deutschland: Zeitschrift für Deradikalisierung und demokratische Kultur, 1(2), 123-148. [details]




    • Knape, S. J., & Feddes, A. R. (2017). Literatuur om bruggen te bouwen: Een voorleesinterventie in de klas ter voorbereiding van positief contact met vluchtelingenkinderen. Literatuur zonder Leeftijd, 31(103), 130–147. [details]
    • Wallner, T., van Emmerik, A. A. P., Feddes, A. R., Fischer, A. H., & Doosje, B. (2017). Trauma, veerkracht en integratie: Een onderzoek naar de relatie tussen traumatische gebeurtenissen, posttraumatische stress, geestelijke gezondheid, veerkracht en integratie van vluchtelingen in Nederland. Universiteit van Amstersdam. [details]




    • Feddes, A. R., & Mann, L. (2013). Versterking van zelfvertrouwen en countering social isolation: Effect evaluation of training DIAMANT. SAFIRE.
    • Feddes, A. R., Mann, L., & Doosje, B. (2013). Does it work? How to evaluate effectiveness of a programme preventing radicalisation. SAFIRE. [details]
    • Feddes, A. R., Mann, L., & Doosje, B. (2013). Final report for EU of empirical study of the SAFIRE-project on processes of radicalisation: a quantitative and qualitative analysis of the radicalisation process. Deliverable WP 5.1. Universiteit van Amsterdam.
    • Feddes, A. R., Mann, L., & Doosje, B. (2013). Key socio-psychological factors in preventive and suppressive interventions. SAFIRE. [details]
    • Feddes, A. R., Mann, L., de Zwart, N., & Doosje, B. (2013). Duale identiteit in een multiculturele samenleving: een longitudinale kwalitatieve effectmeting van de weerbaarheidstraining Diamant. Tijdschrift voor Veiligheid, 12(4), 27-44. [details]
    • Havermans, B. M., Feddes, A. R., & Doosje, B. (2013). An interview study on the effects of a train-the-trainer programme. SAFIRE. [details]


    • Wolf, S. A., & Feddes, A. R. (2016). Perceptions matter more than observations: Different operationalizations of team unity and their relationship to individual and team outcomes.. Poster session presented at Annual meeting of the North American Society for the Psychology of Sport and Physical Activity, Montréal, Québec, Canada.

    Membership / relevant position

    • Feddes, A. (2019-2020). Member of advisory committee project "Overkoepelende evaluatie culturele interventies [Evaluation of cultural interventions]”., Ministry of Work and Social affairs / Risbo (Erasmus Universiteit)..


    • Feddes, A. R. (participant) (10-2018 - 3-2020). Advisor on project "Needs of hate-crime victims in the justice process and social support". Wetenschappelijk Onderzoek- en Documentatiecentrum. (other).
    • Vauclair, C.-M. (participant), Rodrigues, R. B. (participant), Feddes, A. R. (participant) & Podsiadlowski, A. (participant) (9-7-2018 - 14-7-2018). European Science Open Forum (ESOF), Toulouse, France, Toulouse. A society for all? From prejudice and discrimination to social inclusion in a globalized world. Symposium organised at Europeanscience Open Forum (…) (organising a conference, workshop, ...).
    • Sauter, D. A. (participant), Fischer, A. H. (participant) & Feddes, A. R. (participant) (18-11-2017). Zwarte Markt voor de Kennis, Universiteit van Amsterdam (other).
    • Doosje, B. (organiser) & Feddes, A. R. (organiser) (3-12-2015 - 4-12-2015). Political Psychology Conference, Amsterdam. Organizers of the symposium: What Events lead to radicalization and how can we make people resilient? (organising a conference, workshop, ...).
    • Doosje, B. (organiser), Feddes, A. R. (organiser), Mann, L. (organiser) & Dobber, S. (organiser) (2015). Political Psychology conference, Universiteit van Amsterdam. Organizers of the symposium 'Processes of radicalisation.' (organising a conference, workshop, ...).
    • Feddes, A. R. (organiser) & Aarts, W. (organiser) (7-11-2013). Evaluation of interventions to counter radicalisation. Workshop given during the SAFIRE End Event Symposium on Finding Indicators of and Responses to Radicalisation, Amsterdam, November 7. (organising a conference, workshop, ...).
    • Weggemans, A. (organiser), Feddes, A. R. (organiser) & Cahuzac, O. (organiser) (7-11-2013). SAFIRE End Event Symposium on Finding Indicators of and Responses to Radicalisation, Amsterdam, November 7. (organising a conference, workshop, ...).
    • Griffioen-Young, H. (organiser), Feddes, A. R. (organiser), Goetz, P. (organiser), Reding, A. (organiser) & Weggemans, A. (organiser) (6-6-2012). SAFIRE End User symposium on Radicalisation towards Violence., Amsterdam (organising a conference, workshop, ...).
    This list of publications is extracted from the UvA-Current Research Information System. Questions? Ask the library or the Pure staff of your faculty / institute. Log in to Pure to edit your publications. Log in to Personal Page Publication Selection tool to manage the visibility of your publications on this list.
  • Ancillary activities
    • No ancillary activities