Language in boys with fragile X syndrome.
The current paper reports of language production in 15 Hebrew-speaking boys, aged 9;0-13;0, with fully methylated, non-mosaic fragile X syndrome and no concomitant diagnosis of autism. Contrary to expectations, seven children were non-verbal. Language production in the verbal children was studied in free conversations and in context-bound speech. Despite extra caution in calculating MLU, participants' language level was not predicted by mean utterance length. Context bound speech resulted in grammatically more advanced performance than free conversation, and performance in both contexts differed in important ways from performance of typically developing MLU-matched controls. The relevance of MLU as a predictor of productive grammar in disordered populations is briefly discussed.
Levy
Yonata
Y
Psychology Department, Hebrew University-Hadassah Medical School, Jerusalem, Israel. msyonata@huji.ac.il
Gottesman
Riki
R
Borochowitz
Zvi
Z
Frydman
Moshe
M
Sagi
Michal
M
D000293:Adolescent; D002648:Child; D004454:Echolalia; D005600:Fragile X Syndrome / Q000150:complications / Q000235:genetics / Q000503:physiopathology*; D006801:Humans; D007361:Intelligence Tests; D007804:Language Development; D007805:Language Development Disorders / Q000209:etiology / Q000235:genetics / Q000503:physiopathology*; D008297:Male; D013064:Speech Disorders / Q000209:etiology / Q000235:genetics / Q000503:physiopathology*; D013068:Speech Production Measurement; D013637:Tape Recording; D014705:Verbal Behavior