Volume 6 Number 5 (2012) - HealthMED Journal (original) (raw)

The paper investigates the complexities surrounding dimensionality in item response theory (IRT), with a specific focus on the method of Rasch analysis for assessing unidimensionality. It highlights the challenges in determining the dimensionality of scales often overlooked in statistical packages, noting that existing literature reveals limitations of commonly recommended techniques, such as exploratory factor analysis. The primary objective is to devise a systematic approach for evaluating the dimensional tendencies within measurement scales.