Samenvatting

In criminological literature there is an ongoing discussion about the relation between intellectual disability and criminality. Because of differences of definitions and measurement methods prevalence figures may vary. Recent assessment of prevalence in the Netherlands using a valid Dutch screener (the SCIL) reveals a relatively high percentage of people with mild intellectual disability and borderline intelligence in the Dutch criminological system. People with mild intellectual disability and borderline intelligence cannot be considered as belonging to one group. Five typologies with even more subtypes based on mixed characteristics can be distinguished. A need for early detection and personalized interventions is stressed as is treatment based on the specific characteristics of these subtypes.