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The standard error in the Jacobson and Truax Reliable Change Index: the classical approach to the assessment of reliable change


The standard error in the Jacobson and Truax Reliable Change Index: the classical approach to the assessment of reliable change



Journal of the International Neuropsychological Society: Jins 10(6): 888-893



ISSN/ISBN: 1355-6177

PMID: 15637779

Researchers and clinicians using Jacobson and Truax's index to assess the reliability of change in patients, or its counterpart by Chelune et al., which takes practice effects into account, are confused by the different ways of calculating the standard error encountered in the literature (see the discussion started in this journal by Hinton-Bayre). This article compares the characteristics of (1) the standard error used by Jacobson and Truax, (2) the standard error of difference scores used by Temkin et al. and (3) an adaptation of Jacobson and Truax's approach that accounts for difference between initial and final variance. It is theoretically demonstrated that the last variant is preferable, which is corroborated by real data.

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Accession: 050736479

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