Society & Media
Consultancy for the Katholieke Radio Omroep (KRO; consultancy regarding the psychology of everyday life dilemmas (1994-1996)
Consultancy for Eyeworks, a television program production company (2004-2005).
Regular contributor to tv-programs (2005-now)
Regular contributor to Radio 1 (Pavlov, NTR Academie, Talkshows, 2012-now)
Regular contributor to various newspapers, including NRC Handelsblad, Volkskrant, Het Parool, Algemeen Dagblad, and Telegraaf (2011-now)
Teacher of course on "Trust and Communication" (a workshop for city mayors in The Netherlands, 2014-2023)
Teacher of workshop "Psychology of Corruption" at the Anti-Corruption Academy (a workshop for policy makers of corruption, 2017, Austria)
for interview see hereContributor to play Terror by the Art and Inspiration Group, see 20-min video
University of The Netherlands (Universiteit van Nederland) video about corona
Contributor to podcast about empathy and altruism (part 3)
Several published interviews in newspapers (international media and Dutch media)
"Geweld rondom het sportveld, VU-Connected October 24, 2012, [link]
More recently, May 23, 2013 [link] ( see also Charter with recommendations from science [pdf]
"Why men need women" New York Times, July 20, 2013 [link]
"Men with female offspring are 'more generous'", DailyMail, July 22, 2013 [link]
"Vertrouwen zit niet in onze genen" Volkskrant, April 8, 2014 [pdf]
"Why superstitions help athletes perform better, New York Magazine, June 11, 2015 [pdf]
"Very superstitious: Weird rituals help athletes perform better, CNN news, July 7, 2015 [pdf]
"Climate and Violence" in Daily Mail , National Geographic, Sciencenewsonline , NewsHub , and NeuroscienceNews
"Does climate make people more violent?" New York Magazine, June 30, 2016
"Do hot climates make people more violent?" CNN news, July 8, 2016
"Niet meer dan zeven politieke partijen" Volkskrant, December 8, 2016
"Leaping into corruption", Scientific American, February 21, 2017
"Waarom wij niet tegen ons verlies kunnen" Volkskrant, April 28, 2018
"Support for refugees increases when refugees participate in integration programs." The Conversation, July 6, 2018
"Neues vom Flurfunk: Klatsch und Tratsch"" Balance, September 2018 (in German)
Reducing climate change by making it less abstract, Scientific American, April 2019
Does hunger increase selfishness? New York Times, November 2019
Psychological solutions to climate change Spektrum (in German) December 2019
Why pessimists sometimes are right. Financieel Dagblad, October 2020
The government can do so more to help mitigate climate change, NRC, August 2023
Global problems call for a club of wise people, from each continent one. Volkskrant, September 2023
How a conversation can help cope with Israel and Gaza, Volkskrant, November 2023
Want to build trust? Give just a bit more than you received. NRC. March 2024
Without outsider monitoring, fraternities remain sexist, NRC, April 2024
The train is climate-friendly and ideal for getting work done, NRC, February 2025
It is the disposible income that matters from a justice perspective, Trouw, February 2025
Why doesn’t the government organize emergency kits. Het Parool, November 2025
What sports clubs are so important, interview in Sport en Strategie, March 2026
Guest on Television and Radio Programs:
En Dan Nog Even Dit "Altruism and Volunteering" November 28, 2014, for example [link]
Contributor to film for the Custums and Tax Museum (Rotterdam, 2012) [link]
Empathie. De nieuwe liefde, October 1, 2014, for video, see [link]
1 Vandaag "Wanneer willen mensen ingrijpen bij agressie in trein" April 21, 2015 [link]
Are norm violations becoming more common over time? Podcast BNR Quest radio (in Dutch)
Norm violations in times of COVID-19, Radio 1 , and why professional soccer should stay alive and kicking, Radio 1 (October, 2020)
Why do people prefer to interact in dyads (or pairs) rather than groups Radio 1 (January, 2021)
The Netherlands is not well-prepared for an energy crisis. Een Vandaag , November 2025)
Why people still commute to work despite warnings from the government Een Vandaag, (January 2026)