Klaas Sijtsma

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Klaas Sijtsma is a prominent figure in the fields of psychometrics and statistics, particularly known for his contributions to measurement models used in psychological research. His work has focused on various methodologies including classical test theory, factor analysis, and item response theory, which are essential for understanding and improving the assessment of psychological attributes. Sijtsma has authored several influential texts, such as 'Never Waste a Good Crisis' and 'Measurement Models for Psychological Attributes', which serve as foundational resources for scholars and practitioners alike.