1987 Awarded 5-year Research Fellowship Royal Netherlands Academy of Arts and Sciences (KNAW)

1991 Johannes Cornelis Ruigrok Prize for Behavioral Science Research, Royal Holland Society of Sciences and Humanities

1992 Fulbright Award, Senior Scholarship

1993 Appointed Professor of Psychology (Adjunct), Department of Psychology, University of Illinois at Urbana-Champaign

1994 PIONEER Award, Netherlands Organization for Scientific Research

1996 Elected to the International Statistical Institute

2001 Elected as President of the Psychometric Society

2002 Elected to the Royal Netherlands Academy of Arts and Sciences (KNAW)

2003 Appointed to the Social and Behavioral Sciences Research Council (KNAW)

2004 Plenary Address to the Royal Statistical Society

2005, 2008 Elected to the General Board of the Royal Netherlands Academy of Arts and Sciences (KNAW)

2009 Appointed as Visiting Professor, Stanford University

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