ERIC Number: EJ887672
Record Type: Journal
Publication Date: 2010-Jun
Abstractor: As Provided
Differentiating Cantonese-Speaking Preschool Children with and without SLI Using MLU and Lexical Diversity (D)
Wong, Anita M.-Y.; Klee, Thomas; Stokes, Stephanie F.; Fletcher, Paul; Leonard, Laurence B.
Journal of Speech, Language, and Hearing Research, v53 n3 p794-799 Jun 2010
Purpose: In this study, the authors examined the diagnostic accuracy of a composite clinical assessment measure based on mean length of utterance (MLU), lexical diversity (D), and age (Klee, Stokes, Wong, Fletcher, & Gavin, 2004) in a second, independent sample of 4-year-old Cantonese-speaking children with and without specific language impairment (SLI). Method: The composite measure was calculated from play-based, conversational language samples of 15 children with SLI and 14 children without SLI. Scores were dichotomized and compared to diagnostic outcomes using a reference standard based on clinical judgment supported by test scores. Results: Eleven of 15 children with SLI and 8 of 14 children with typical language skills were correctly classified by the dichotomized composite measure. The measure's sensitivity in this second sample was 73.3% (95% confidence interval [CI] 48%-89%); specificity was 57.1% (95% CI 33%-79%); positive likelihood ratio was 1.71 (95% CI 0.87-3.37); and negative likelihood ratio was 0.47 (95% CI 0.18-1.21). Conclusions: The diagnostic accuracy of the composite measure was substantially lower than in the original study, suggesting that it is unlikely to be informative for clinical use in its present form. The value of replication studies is discussed.
Descriptors: Preschool Children, Language Impairments, Sino Tibetan Languages, Clinical Diagnosis, Diagnostic Tests
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A