• 2005 - Member of the Selection Committee SPINOZA awards (NWO)
• 1997 - Member of the American Psychological Association
• 1996 - Elected Member of the International Statistical Institute
• 1992 - Member of the American Statistical Association
• 1989 - Member of the Institute of Mathematical Statistics
• 1988 - Member of the Netherlands Society for Ordination and Classification
• 1988 - Fellow of the Royal Statistical Society
• 1986 - Member of the Classification Society of North America
• 1985 - Member of the Netherlands Society for Statistics and Operations Research
• 1982 - Member of the Psychometric Society

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Last updated: 4th June 2013