Reliability Generalization: An HLM Approach.

Abstract

Focuses on the conditional and unconditional hierarchical linear models used for measuring marginal errors at different levels in educational measurements. Importance of the reliability index in educational and psychological measurement; Definition of reliability; Association between measurement errors decrease and measurement consistency increase.ABSTRACT FROM AUTHOR Hierarchical data structures have been identified in educational and psychological measurement, and statistical approaches are developed to partition the score variances at multiple levels of the data hierarchy. On basis of the classical test theory and the current HLM literature, the reliability index has been constructed for unconditional and conditional models to facilitate generalization of the reliability computing in various test settings.ABSTRACT FROM AUTHOR