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

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 t...

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Bibliographic Details
Published in:Journal of the International Neuropsychological Society 2004-10, Vol.10 (6), p.888-893
Main Author: MAASSEN, GERARD H.
Format: Article
Language:English
Subjects:
Algorithms
Confidence intervals
CRITICAL REVIEW
Data Interpretation, Statistical
Humans
Measurement errors
Neuropsychological Tests - statistics & numerical data
Outcome and Process Assessment (Health Care) - statistics & numerical data
Practice (Psychology)
Practice effects
Psychometrics - statistics & numerical data
Reference Values
Regression Analysis
Reliable change
Reproducibility of Results
Standard error of difference scores
Standard error of measurement of difference scores
Studies
Test–retest data
Theory
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Summary: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. (JINS, 2004, 10, 888–893.)
ISSN:1355-6177
1469-7661
DOI:10.1017/S1355617704106097