Adèr (born May 20, 1940[1]) is a Dutch statistician/methodologist and consultant at the Vrije Universiteit, the VU University Medical Center and the University of Stavanger, known for work on Methodological Modelling and Social Research Methodology.
Later in 1995 there he also received his PhD with a thesis entitled "Methodological knowledge : notation and implementation in expert systems."
In 1993, he moved to the VU University Medical Center, where he was associate professor at the Department of Clinical Epidemiology and Biostatistics until 2005.
[1] Since the 1980s, Adèr as researcher and consultant affiliated with the Centrum Wiskunde & Informatica in Amsterdam.
[1] Adèr has authored and co-authored numerous publications in his field of expertise.