Mean Length of Utterance Levels in 6-Month Intervals for Children 3 to 9 Years with and without Language Impairments

Autor/inn/en	Rice, Mabel L.; Smolik, Filip; Perpich, Denise; Thompson, Travis; Rytting, Nathan; Blossom, Megan
Titel	Mean Length of Utterance Levels in 6-Month Intervals for Children 3 to 9 Years with and without Language Impairments
Quelle	In: Journal of Speech, Language, and Hearing Research, 53 (2010) 2, S.333-349 (17 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2009/08-0183)
Schlagwörter	Control Groups; Intelligence; Intervals; Morphemes; Language Impairments; Effect Size; Nonverbal Ability; Language Acquisition; Children; Age Differences; Evaluation Methods; Intervention; Comparative Analysis + Suchen Sie Ihr Suchwort? Intelligenz; Klugheit; Morphem; Speech disorder; Speech disorders; Speech disabilities; Speech disability; Speech handicap; Speech handicaps; Speech impairment; Speech impairments; Language handicaps; Sprachbehinderung; Sprachaneignung; Spracherwerb; Child; Kind; Kinder; Age; Difference; Age difference; Altersunterschied
Abstract	Purpose: The mean length of children's utterances is a valuable estimate of their early language acquisition. The available normative data lack documentation of language and nonverbal intelligence levels of the samples. This study reports age-referenced mean length of utterance (MLU) data from children with specific language impairment (SLI) and children without language impairments. Method: Of the 306 child participants drawn from a data archive, ages 2;6-9;0 (years;months), 170 were in the SLI group and 136 were in the control group. There were 1,564 spontaneous language samples collected, and these were transcribed and analyzed for sample size and MLU in words and morphemes. Means, standard deviations, and effect sizes for group differences are reported for MLUs, along with concurrent language and nonverbal intelligence assessments, per 6-month intervals. Results: The results document an age progression in MLU words and morphemes and a persistent lower level of performance for children with SLI. Conclusion: The results support the reliability and validity of MLU as an index of normative language acquisition and a marker of language impairment. The findings can be used for clinical benchmarking of deficits and language intervention outcomes as well as for comparisons across research samples. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10