Abstract
The speech and language disorders of these severely disturbed children can be divided into two categories which relate to the type of psychiatric disturbance. The autistic-schizophrenic children used bizarre forms of language or did not use communicative language at all. The non-autistic-schizophrenic, the neurotic, the primary behaviour disorder, and the minimally brain-damaged children as a group, had similar speech and language problems to normal children but of a more severe and frequent nature. Their problems were predominantly in the areas of speech and language development, articulation, rate of speech and fluency. The children with primary behaviour disorders had the more severe speech and language problems.

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