Steckol K F, Leonard L B
J Commun Disord. 1979 Jul;12(4):291-301. doi: 10.1016/0021-9924(79)90027-3.
An examination was made of the grammatical morpheme usage of normal children and language-impaired children matched at two different levels of mean utterance length. The language-impaired children displayed less grammatical morpheme usage than the normal children with equivalent mean utterance length. However, no use of alternative features of semantic importance by the language-impaired children was noted, suggesting that no unique patterns for acquiring language were in operation. Instead, it appears that the language-impaired children may have attached less communicative significance to grammatical morphemes.
对平均话语长度处于两个不同水平的正常儿童和语言障碍儿童的语法语素使用情况进行了考察。与平均话语长度相当的正常儿童相比，语言障碍儿童的语法语素使用较少。然而，未发现语言障碍儿童使用具有语义重要性的替代特征，这表明不存在独特的语言习得模式在起作用。相反，语言障碍儿童似乎对语法语素赋予的交际意义较少。
