The Interuniversity Graduate School of Psychometrics and Sociometrics (IOPS) is an institute for the advanced dissertation training in psychometrics and sociometrics; it also coordinates the high-quality research in this area. The IOPS is officially accredited by the KNAW (Royal Netherlands Academy of Arts and Sciences) as a Graduate School (’onderzoekschool’).

IOPS Best Paper award 2011

On June 28, 2012, The IOPS Best Paper Award 2011 was receved by Rogier Kievit for his paper Kievit, R.A., et al. (2011), Mind the gap: A psychometric approach to the reduction problem. Psychological Inquiry, 22, 67-87.