How Often Do Subscores Have Added Value? Results from Operational and Simulated Data

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A Tutorial on Interpreting Bifactor Model Scores (2013, background): “…specific factors were allowed to correlate, the correlated factors model would be nested within the bifactor model (Rindskopf & Rose, 1988). true for achievement tests (Sinharay, 2010; Sinharay et al., 2011), but in many contexts this decision is made by policymakers without regard to model fit.”