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Direct linkDrewes, Donald W. – Psychological Methods, 2009
A unifying theory of subject-centered scalability is offered that is grounded in structural true score modeling, is conceptually distinct from internal consistency and homogeneity as determined by item correlations, and is empirically confirmable. Scalability holds when item true scores are perfectly correlated but differ in their individual scale…
Descriptors: Rating Scales, Factor Analysis, True Scores, Mathematical Models
