This leaves researchers and practitioners who are interested in a certain instrument in a precarious situation: Before starting their own data collection, they do not know whether dimensions adequately discriminate from each other and thus whether they can have confidence in any interpretation of these dimensions. However, validity evidence supporting the proposed internal structure is often missing. Multidimensional instruments posit several components that are each expected to be homogeneous but distinct from each other. The assessment of an instrument’s conceptual framework as prerequisite for conducting further analyses has been advocated for decades.
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