Assessing the discriminating power of item and test scores in the linear factor-analysis model

Model-based attempts to rigorously study the broad and imprecise concept of 'discriminating power' are scarce, and generally limited to nonlinear models for binary responses. This paper proposes a comprehensive framework for assessing the discriminating power of item and test scores which are analyzed or obtained using Spearman’s factor-analytic model. The proposed framework is organized on the basis of three criteria: (a) type of score, (b) range of discrimination, and (c) [...]

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