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Conceptual Issues in CSEM Estimation and Interpretation: Commentary on Pfadt et al
Journal article   Open access   Peer reviewed

Conceptual Issues in CSEM Estimation and Interpretation: Commentary on Pfadt et al

Won-Chan Lee
Psychometrika
05/19/2026
DOI: 10.1017/psy.2026.10116
PMID: 42152591
url
https://doi.org/10.1017/psy.2026.10116View
Published (Version of record) Open Access

Abstract

Pfadt et al. (2026) present accessible methods for estimating conditional standard errors of measurement (CSEMs) and implement them in the open-source software JASP. Their emphasis on individual-level precision represents an important contribution to applied measurement practice. This commentary discusses several conceptual issues that clarify and extend the authors’ treatment of dimensionality, error definition, and score interpretation. The aim is to strengthen alignment between CSEM estimation and the interpretive purposes for which test scores are used.
reliability conditional standard error of measurement classical test theory item response theory generalizability theory

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