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Gepubliceerd in: Journal of Autism and Developmental Disorders 12/2014

01-12-2014 | Original Paper

Reliability of the ADI-R for the Single Case-Part II: Clinical Versus Statistical Significance

Auteurs: Domenic V. Cicchetti, Catherine Lord, Kathy Koenig, Ami Klin, Fred R. Volkmar

Gepubliceerd in: Journal of Autism and Developmental Disorders | Uitgave 12/2014

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Abstract

In an earlier investigation, the authors assessed the reliability of the ADI-R when multiple clinicians evaluated a single case, here a female 3 year old toddler suspected of having an autism spectrum disorder (Cicchetti et al. in J Autism Dev Disord 38:764–770, 2008). Applying the clinical criteria of Cicchetti and Sparrow (Am J Men Def 86:127–137, 1981); and those of Cicchetti et al. (Child Neuropsychol 126–137, 1995): 74 % of the ADI-R items showed 100 % agreement; 6 % showed excellent agreement; 7 % showed good agreement; 3 % manifested average agreement; and the remaining 10 % evidenced poor agreement. In this follow-up investigation, the authors described and applied a novel method for determining levels of statistical significance of the reliability coefficients obtained in the earlier investigation. It is based upon a modification of the Z test for comparing a given level of inter-examiner reliability with a lower limit value of 70 % (Dixon and Massey in Introduction to statistical analysis. McGraw-Hill, New York, 1957). Results indicated that every item producing a clinically acceptable level of inter-examiner reliability was also statistically significant. However, the reverse was not true, since a number of the items with statistically significant reliability levels did not reach levels of agreement that were clinically meaningful. This indicated that clinical significance was an accurate marker of statistical significance. The generalization of these findings to other areas of diagnostic interest and importance is also examined.
Literatuur
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Metagegevens
Titel
Reliability of the ADI-R for the Single Case-Part II: Clinical Versus Statistical Significance
Auteurs
Domenic V. Cicchetti
Catherine Lord
Kathy Koenig
Ami Klin
Fred R. Volkmar
Publicatiedatum
01-12-2014
Uitgeverij
Springer US
Gepubliceerd in
Journal of Autism and Developmental Disorders / Uitgave 12/2014
Print ISSN: 0162-3257
Elektronisch ISSN: 1573-3432
DOI
https://doi.org/10.1007/s10803-014-2177-8