I helped develop norms for a number of tests. For (cognitive) tests for childeren and adolescents it is important to avoid the bias that occurs with traditional cohort norms when a testee moves from one norm table to the next one; for popular IQ tests these biases are commonly 3-4 IQ points. By using continuous norming norms score can be calculated at the level of age in days and the norm table transition gaps are avoided. I helped with the development of such norms for the Cattell Fluid Intelligence Test (CFT 20-R) for the UK, the Netherlands, Sweden and Norway, the d2 and d2-R (Netherlands), the Adaptive Behavior Assessment System (ABAS-3) for Sweden, and several school progress tests for Boom testuigevers.
Other test and questionnaires
Other tests and questionnaires I was involved with in developing or adapting include: The Self-Directed Search, the Hogan Personality Inventory, the Hogan Development Survey, the Randstad Vocational Interest Test, the Gastrointestinal Quality of Life Index, the Medical Outcome Studies (SF-20), the Dutch Eating Behavior Questionnaire (DEBQ-C), the Emotion Awareness Questionnaire, and the Motivation at School Questionnaire (LMT).