Occassional advisor for the Ministery of Traffic and Water Management (1993-1995; 2005-2007).

Occassional consultancy for the Katholieke Radio Omroep (KRO; consultancy regarding the psychology of everyday life dilemmas -- a program broadcasted on national television; 1996).

Occassional consultancy for Eyeworks, a television program production company (2004-2005).

Several published interviews in newspapers

Most recent: De mens als sociaal individu, De Groene Amsterdammer (by Rutger van der Hoeven, December 15, 2006).