A learning disorder characterized by an impairment in comprehension and/or use of verbal communication or the written or other symbol system of communication, which may be associated with neurological, psychological, physical or sensory factors, and which may:
a) involve one or more of the form, content and function of language in communication;
b) include one or more of the following:
- language delay
- voice and articulation development, which may or may not be organically or functionally based.