1. Department of Developmental Psychology, Utrecht University, Utrecht, TC, The Netherlands
2. De Ambelt Academie, De Ambelt, The Netherlands
3. Regional Centre of Expertise for EBD Schools (RENN4), Groningen, The Netherlands
4. Department of Methods & Statistics, Utrecht University, Utrecht, The Netherlands
5. Optenia Research Program, Faculty of Humanities, North-West University, Vanderbijlpark, South-Afrika