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Direct linkLaenen, Annouschka; Alonso, Ariel; Molenberghs, Geert; Vangeneugden, Tony – Psychometrika, 2009
Reliability captures the influence of error on a measurement and, in the classical setting, is defined as one minus the ratio of the error variance to the total variance. Laenen, Alonso, and Molenberghs ("Psychometrika" 73:443-448, 2007) proposed an axiomatic definition of reliability and introduced the R[subscript T] coefficient, a measure of…
Descriptors: Error of Measurement, Case Studies, Simulation, Reliability
Laenen, Annouschka; Alonso, Ariel; Molenberghs, Geert – Psychometrika, 2007
A new measure for reliability of a rating scale is introduced, based on the classical definition of reliability, as the ratio of the true score variance and the total variance. Clinical trial data can be employed to estimate the reliability of the scale in use, whenever repeated measurements are taken. The reliability is estimated from the…
Descriptors: Schizophrenia, Rating Scales, Likert Scales, True Scores
