# Klaas Sijtsma

> Dutch psychometrician

**Wikidata**: [Q100755448](https://www.wikidata.org/wiki/Q100755448)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Klaas_Sijtsma)  
**Source**: https://4ort.xyz/entity/klaas-sijtsma


## References

1. Czech National Authority Database
2. Mathematics Genealogy Project
3. [Source](https://research.tilburguniversity.edu/en/publications/evaluating-model-assumptions-in-item-response-theory)
4. [Source](https://research.tilburguniversity.edu/en/publications/acquisition-development-and-assessment-of-social-communicative-co/)
5. Virtual International Authority File
6. CiNii Research
7. Library of Congress Authorities
8. National Library of Israel Names and Subjects Authority File