Iris holds a double master in clinical psychology and methodology and statistics of psychology (Leiden University). Iris obtained her PhD at the department of Epidemiology and Biostatistics of the VU University medical center in Amsterdam. Her dissertation was about dealing with missing data in questionnaire items and total scores. Currently, Iris teaches a course on missing data analysis in the epidemiology masters program at VU University medical center. At TNO Iris works on a variety of projects as methodologist and statistical analyst related to child health, e.g. measuring child development (d-score) and adaptive screenings for psycho-social problems (psycat) and general data analysis challenges, e.g. harmonizing and combining datasets from different sources, analysing big data, enriching cohort data with national registry information.