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

Autor/inn/en	Cicchetti, Domenic V.; Lord, Catherine; Koenig, Kathy; Klin, Ami; Volkmar, Fred R.
Titel	Reliability of the ADI-R for the Single Case-Part II: Clinical versus Statistical Significance
Quelle	In: Journal of Autism and Developmental Disorders, 44 (2014) 12, S.3154-3160 (7 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0162-3257
DOI	10.1007/s10803-014-2177-8
Schlagwörter	Autism; Females; Toddlers; Pervasive Developmental Disorders; Test Reliability; Test Items; Statistical Significance; Clinical Diagnosis; Disability Identification + Suchen Sie Ihr Suchwort? Autismus; Weibliches Geschlecht; Infant; Infants; Toddler; Kleinkind; Testreliabilität; Test content; Testaufgabe
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. (As Provided).
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Update	2017/4/10