The current study examined the psychometric properties of scores from the Redox Concept Inventory (ROXCI) scores using both confirmatory factor analysis (CFA) and Rasch analysis. CFA analysis provides evidence for construct validity, and Rasch analysis demonstrates the performance of ROXCI items in terms of their accuracy in estimating person…

Representational competence is essential for the acquisition of conceptual understanding in physics. It enables the interpretation of diagrams, graphs, and mathematical equations, and relating these to one another as well as to observations and experimental outcomes. In this study, we present the initial validation of a newly developed…