以句长衡量弱智儿童语言发展水平的可行性分析

The availability of using the mean length of utterances to measure the language development of mentally retarded children

目的 研究弱智儿童句长发展的规律。方法 以一套自编图片为材料，测试弱智儿童看图说话情景中所表达的句子的平均长度。结果 弱智儿童的智龄(MA)与平均句长(MLU)之间存在着极其显著的正相关，其中，智龄为5.0～5.5的弱智儿童语言能力有较为显著的提高；弱智儿童的MLU的发展不及同智龄的正常儿童。结论 MLU可以作为衡量弱智儿童语言发展的标准之一。

Objective To study the development law of the mean length of utterances(MLU)on mentally retarded children.Method A series of self－selected pictures was used to measure MLU of mentally retarded children while they spoke with the aid of the pictures.Result Mentally retarded(MR)children's mental age(MA)is remarkably related to their MLU,and MR children' language abilities(with 5.0～5.5 MA)has been greatly increased.Their development in MLU is not as remarkable as that of normal children with the same MA.Conclusion Generally,we can use MLU as a criterion to measure the language development of MR children.