Revision Q-matrix in middle school chemistry: a structural equation modeling approach.

ABSTRACT: The Q-matrix serves as a bridge that links items and attributes, and its accuracy affects the results of cognitive diagnosis. Inaccuracy of the Q-matrix are a common issue frequently encountered in cognitive diagnosis research. This study utilizes the topic "composition and structure of matter" from junior high school chemistry as a representative example, employing Structural Equation Modeling (SEM) to validate the original Q-matrix of the cognitive diagnostic assessment tool. This method prioritizes qualitative analysis results from the perspective of disciplinary connotation, while integrating the signs and significance of regression weights, modification indices (MI), and model fit indices, etc. obtained from SEM, to conducted an iterative process of model revision, parameter es

SUBMITTER: Lin S 

PROVIDER: S-EPMC12545035 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature