1. The psychology of online activism and social movements: Relations between online and offline collective action

   Greijdanus, H., de Matos Fernandes, C. A., Turner-Zwinkels, F., Honari, A., Roos, C. A., Rosenbusch, H. & Postmes, T., 12-Mar-2020, (Accepted/In press) In : Current Opinion in Psychology. 35, p. 49-54 6 p.

   Research output: Contribution to journal › Article › Academic › peer-review

2. The polarizing effects of group discussion in a negative normative context: Integrating societal‐, group‐, and individual‐level factors

   Koudenburg, N., Greijdanus, H. & Scheepers, D., Jan-2019, In : british Journal of Social Psychology. 58, 1, p. 150-174 25 p.

   Research output: Contribution to journal › Article › Academic › peer-review

3. Sociale media en collectieve actie rondom de gasboringen in Groningen

   Greijdanus, H. & Postmes, T., 23-Nov-2018, Groningen: Rijksuniversiteit Groningen. 206 p.

   Research output: Book/Report › Report › Professional

4. Stereotypen

   Gordijn, E., Wigboldus, D. & Greijdanus, H., Jul-2017, Sociale psychologie. Vonk, R. (ed.). 4 ed. Amsterdam: Boom

   Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

5. Steeling Ourselves: Intragroup Communication while Anticipating Intergroup Contact Evokes Defensive Intergroup Perceptions

   Greijdanus, H., Postmes, T., Gordijn, E. H. & van Zomeren, M., 22-Jun-2015, In : PLoS ONE. 10, 6, 23 p., e0131049.

   Research output: Contribution to journal › Article › Academic › peer-review

6. Intragroup communication in intergroup conflict: Influences on social perception and cognition

   Greijdanus, H. J. E., 2015, [Groningen]: University of Groningen. 200 p.

   Research output: Thesis › Thesis fully internal (DIV) › Academic

7. When abstraction does not increase stereotyping: Preparing for intragroup communication enables abstract construal of stereotype-inconsistent information

   Greijdanus, H., Postmes, T., Gordijn, E. H. & van Zomeren, M., Dec-2014, In : Social Cognition. 32, 6, p. 505-527 23 p.

   Research output: Contribution to journal › Article › Academic › peer-review

8. Escalation and de-escalation of intergroup conflict: The role of communication within and between groups

   Postmes, T., Gordijn, E., van Zomeren, M., Greijdanus, H., de Vos, B., Täuber, S. & Kamans, E., 2014, Social conflicts within and between groups. De Dreu, C. K. W. (ed.). Psychology Press, p. 93-116 23 p. (Current issues in social psychology).

   Research output: Chapter in Book/Report/Conference proceeding › Chapter › Academic

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1. In het hoofd van de dreigbriefschrijver over windmolens

   Hedy Greijdanus

   06/04/2019

   1 Media contribution

   Press/Media: Expert Comment › Popular

2. Sociale media hebben praktijk collectieve actie sterk veranderd

   Hedy Greijdanus & Tom Postmes

   01/03/2019 → 13/03/2019

   4 items of Media coverage

   Press/Media: Research › Professional

3. Interview blogger "Welke kast?"

   Hedy Greijdanus

   06/10/2015

   1 item of Media coverage

   Press/Media: Expert Comment › Popular

4. Verander negatieve stereotypen: Let beter op je taal

   Hedy Greijdanus

   28/07/2015

   1 item of Media coverage

   Press/Media: Expert Comment › Popular

5. Interview OOG TV Radio Glasnost Noorderzon

   Hedy Greijdanus

   28/08/2015

   1 Media contribution

   Press/Media: Research › Popular

6. Radio EenVandaag

   Hedy Greijdanus

   29/06/2015

   1 Media contribution

   Press/Media: Research › Popular

7. MindWise blog: Countering negative stereotypes with positive stereotypes

   Hedy Greijdanus

   24/06/2015

   1 item of Media coverage

   Press/Media: Expert Comment › Popular

8. Press release: Positive stereotyping best remedy for negative stereotyping

   Hedy Greijdanus

   19/06/2015 → 19/06/2015

   3 items of Media coverage

   Press/Media: Other › Popular

View all (8) »

1. Online gedrag en internetconsultatie

   Hedy Greijdanus (Consultant)

   Feb-2020

   Activity: Consultancy › Professional

2. Newsnight: jaaroverzicht - Janine Abbring blikt samen met tafelheer Arjen Lubach terug op 2019

   Hedy Greijdanus (Invited speaker)

   20-Dec-2019

   Activity: Talk or presentation › Popular

3. Sociale media en collectieve actie rondom de gasboringen in Groningen

   Hedy Greijdanus (Invited speaker), Tom Postmes (Invited speaker)

   28-Nov-2019

   Activity: Talk or presentation › Professional

4. Social media and collective action: The case of gas extraction in Groningen

   Hedy Greijdanus (Keynote speaker)

   30-Apr-2019

   Activity: Talk or presentation › Academic

5. The social animal

   Hedy Greijdanus (Organiser), Carla Anne Roos (Organiser), Tom Postmes (Keynote/plenary speaker), Justin Richardson (Invited speaker), Ellen van der Werff (Invited speaker), Anne Marthe van der Bles (Invited speaker), Yasin Koc (Invited speaker)

   14-Mar-2019

   Activity: Participating in or organising an event › Organising an event › Popular

6. Sociale media en protest in Grunn: Eindpresentatie voor betrokkenen

   Hedy Greijdanus (Speaker), Tom Postmes (Speaker)

   28-Feb-2019

   Activity: Talk or presentation › Popular

7. Onbegrensde liefde

   Hedy Greijdanus (Invited speaker)

   14-Feb-2019

   Activity: Talk or presentation › Popular

8. Eindpresentatie Sociale media en collectieve actie rondom de gasboringen in Groningen

   Hedy Greijdanus (Speaker), Tom Postmes (Speaker)

   23-Nov-2018

   Activity: Talk or presentation › Professional

9. Intergroup conflict: The cognitive, emotional, and behavioral consequences of communication and Intergroup Behaviour

   Hedy Greijdanus (Organiser)

   27-Jun-2013 → 30-Jun-2013

   Activity: Participating in or organising an event › Participation in conference › Academic

View all (18) »