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J Speech Lang Hear Res. 2012 Aug;55(4):1022-38. doi: 10.1044/1092-4388(2011/11-0075). Epub 2012 Jan 9.

Effects of sampling context on spontaneous expressive language in males with fragile X syndrome or Down syndrome.

Author information

1
Waisman Center, University of Wisconsin-Madison, Wisconsin, USA. kover@wisc.edu

Abstract

PURPOSE:

In this study, the authors examined the impact of sampling context on multiple aspects of expressive language in male participants with fragile X syndrome in comparison to male participants with Down syndrome or typical development.

METHOD:

Participants with fragile X syndrome ( n = 27), ages 10-17 years, were matched groupwise on nonverbal mental age to adolescents with Down syndrome ( n = 15) and typically developing 3- to 6-year-olds ( n = 15). Language sampling contexts were an interview-style conversation and narration of a wordless book, with scripted examiner behavior. Language was assessed in terms of amount of talk, mean length of communication unit (MLCU), lexical diversity, fluency, and intelligibility.

RESULTS:

Participants with fragile X syndrome had lower MLCU and lexical diversity than did participants with typical development. Participants with Down syndrome produced yet lower MLCU. A differential effect of context among those with fragile X syndrome, Down syndrome, and typical development emerged for the number of attempts per minute, MLCU, and fluency. For participants with fragile X syndrome, autism symptom severity related to the number of utterances produced in conversation. Aspects of examiner behavior related to participant performance.

CONCLUSION:

Sampling context characteristics should be considered when assessing expressive language in individuals with neurodevelopmental disabilities.

PMID:
22232386
PMCID:
PMC3337358
DOI:
10.1044/1092-4388(2011/11-0075)
[Indexed for MEDLINE]
Free PMC Article

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