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Am J Ment Retard. 2008 May;113(3):214-30. doi: 10.1352/0895-8017(2008)113[214:SNOLAC]2.0.CO;2.

Signaling noncomprehension of language: a comparison of fragile X syndrome and Down syndrome.

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Waisman Center, University of Wisconsin-Madison, Madison, WI 53705, USA.

Erratum in

  • Am J Ment Retard. 2009 Sep;114(5):ii.


Signaling noncomprehension of the spoken messages of others was examined for youth with fragile X or Down syndrome in comparison with each other and nonverbal MA-matched typically developing children. A direction-following task was used in which some of the directions were inadequate. Both syndrome groups signaled noncomprehension less often than did the typically developing children. The ability to signal noncomprehension appropriately was related to a measure of receptive vocabulary and syntax. Preliminary analyses indicated that males with fragile X syndrome signaled noncomprehension less often than did their female peers, even after controlling for differences in nonverbal MA.

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