Klaas Sijtsma

Klaas Sijtsma is a Dutch psychologist and applied statistician. He is an emeritus professor at Tilburg University in Netherlands.[1][2]

Education and career

Sijtsma received his Bachelors and doctorate degrees from the University of Groningen in 1982 and 1988, respectively. His doctoral thesis was supervised by Ivo W. Molenaar.[3] He was a faculty member of University of Groningen, the Vrije Universiteit Amsterdam, Utrecht University. He joined Tilburg University as a faculty member in 1997.[4][5]

Sijtsma was President of the Psychometric Society (2010-2011),[6] Dean of the Tilburg School of Social and Behavioral Sciences (2011-2017), Rector Magnificus of Tilburg University (2019-2020),[1][7] and the chair of the Dutch Committee on Tests and Testing or COTAN (2005-2010).[8]

Sijtsma received the Career Award for Lifetime Achievement from the Psychometric Society in 2023.[9][10]

Research

Sijtsma published more than 200 articles and book chapters on a variety of topics in psychology and psychometrics. He is a co-author of three books on psychometrics including a Dutch-language textbook on test theory (with Pieter Drenth), Introduction to Nonparametric Item Response Theory (with Ivo W Molenaar),[11][12] Measurement Models for Psychological Attributes (with L. Andries van der Ark),[13] and Never Waste a Good Crisis Lessons Learned from Data Fraud and Questionable Research Practices.[14]

References

  1. ^ a b "Klaas Sijtsma, Tilburg University". Psychometric Society. 25 July 2023. Retrieved 9 January 2026.
  2. ^ Wijsen, Lisa D. (2023). "Klaas Sijtsma". Twenty Interviews With Psychometric Society Presidents. Springer Books. pp. 261–273. doi:10.1007/978-3-031-34858-7_20.
  3. ^ Wijsen, Lisa D.; Borsboom, Denny; Cabaço, Tiago; Heiser, Willem J. (2019). "An Academic Genealogy of Psychometric Society Presidents". Psychometrika. 84 (2): 562–588. doi:10.1007/s11336-018-09651-4. ISSN 0033-3123. PMC 6502785. PMID 30656499.
  4. ^ "Klaas Sijtsma receives honorary medal for his special merits to Tilburg University". Retrieved 24 January 2026.
  5. ^ "Klaas Sijtsma, Tilburg University; A Century of Reliability: Issues and Concerns".
  6. ^ "Past, Present, and Incoming Presidents". Psychometric Society. 3 December 2019. Retrieved 9 January 2026.
  7. ^ "Prof. dr. Klaas Sijtsma, Rector Magnificus". Tilburg University (in Dutch). Retrieved 9 January 2026.
  8. ^ Sijtsma, Klaas (23 January 2018). "Never Waste a Good Crisis: Toward Responsible Data Management" (PDF). The University of Hong Kong. Retrieved 3 January 2026.
  9. ^ "Klaas Sijtsma receives Psychometric Society Career Award for Lifetime Achievement". Tilburg University. Retrieved 9 January 2026.
  10. ^ "Congratulations to 2023 Award Winners!". Psychometric Society. 13 February 2023. Retrieved 9 January 2026.
  11. ^ Sijtsma, Klaas; WMolenaar, Ivo (2002). Introduction to Nonparametric Item Response Theory. SAGE Publications, Inc. ISBN 978-1-4129-8467-6.
  12. ^ "Book Review". 13 February 2023.
  13. ^ Sijtsma, Klaas; van der Ark, L. Andries (2020). Measurement models for psychological attributes. Boca Raton: Taylor and Francis, CRC Press. ISBN 978-0-367-42452-7.
  14. ^ Sijtsma, Klaas (2023). Never Waste a Good Crisis: Lessons Learned from Data Fraud and Questionable Research Practices. Milton: CRC Press LLC. ISBN 978-1-032-18374-9.
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