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Personal profile


Jellie Sierksma is an Assistant Professor at the Department of Experimental and Applied Psychology at the VU Amsterdam. Her research focuses on children’s prosocial behavior and the development of prejudice, stereotypes and discrimination. She studies these topics taking an interdisciplinary approach, combining insights from developmental, social, and educational psychology and by using experimental- and survey-methods.

Jellie obtained her Master degree in social psychology in 2010 (UVA; cum laude) and a PhD in social development in 2015 (University of Utrecht). She then obtained a grant to work as a post-doc at the Radboud University Nijmegen for 2 years, followed by a 2-year Rubicon-fellowship at the University of Wisconsin-Madison in the USA. In 2019 she was awarded a Veni-grant by the Netherlands Organisation for Scientific Research (NWO).

Ancillary activities

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Ancillary activities are updated daily


  • BF Psychology
  • social development
  • discrimination
  • prosocial behavior
  • moral development
  • stereotypes
  • prejudice
  • intergroup relations
  • social cogniton

Fingerprint Dive into the research topics where Jellie Sierksma is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

Peer Group Medicine & Life Sciences
outgroup Social Sciences
Ethnic Groups Medicine & Life Sciences
Group Social Sciences
Helping Behavior Medicine & Life Sciences
Child Behavior Medicine & Life Sciences
Acculturation Medicine & Life Sciences
social psychology Social Sciences

Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Research Output 2014 2020

When Helping Hurts: Children Think Groups That Receive Help Are Less Smart

Sierksma, J. & Shutts, K., 3 Jan 2020, In : Child Development.

Research output: Contribution to JournalArticleAcademicpeer-review


Children tell more prosocial lies in favor of in-group than out-group peers

Sierksma, J., Spaltman, M. & Lansu, T. A. M., Jul 2019, In : Developmental Psychology. 55, 7, p. 1428-1439 12 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Peer Group
group membership
peer group

Majority group children expect that ethnic out-group peers feel fewer positive but more negative emotions than in-group peers

Sierksma, J. & Bijlstra, G., Sep 2019, In : Cognition and Emotion. 33, 6, p. 1210-1223 14 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Peer Group
Ethnic Groups
Vulnerable Populations

Children's helping behavior in an ethnic intergroup context: Evidence for outgroup helping

Sierksma, J., Lansu, T. A. M., Karremans, J. C. & Bijlstra, G., May 2018, In : Developmental Psychology. 54, 5, p. 916-928 13 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Helping Behavior
Peer Group
Child Behavior
peer group

Costs of helping only influence children's intention to help ethnic out-group peers

Sierksma, J., Sep 2018, In : Journal of Experimental Child Psychology. 173, p. 85-99 15 p.

Research output: Contribution to JournalArticleAcademicpeer-review

Ethnic Groups
Costs and Cost Analysis
Helping Behavior