Clinically, the patient may have severely limited vocabulary, make errors of tense, recall words poorly or produce sentences that are shorter or less complex than is developmentally appropriate. This disorder interferes with educational or occupational achievement or with social communication. It does not fulfill criteria for a Mixed Receptive-Expressive Language Disorder or a Pervasive Developmental Disorder. If the patient also has Mental Retardation, environmental deprivation or a speech-motor or sensory deficit, the problems with language are worse than you would expect with these problems. Environmental Deprivation .
Some disorders have similar or even the same symptoms.
Mixed Receptive-Expressive Language Disorder Pervasive Developmental Disorder. The child has difficulty understanding and using language. The cause of this disorder is unknown. Problems with receptive skills begins before the age of 4. Direct theraputic intervention for speech and language difficulties, together with and psychotherapy, if necessary, are the best approaches to this type of language disorder.