Pragmatic Language Impairment (PLI)
Pragmatic language impairment (PLI) is an impairment in understanding pragmatic areas of language. This type of impairment was previously called semantic-pragmatic disorder (SPD). Pragmatic language impairments are related to autism and Asperger syndrome. People with these impairments have special challenges with the semantic aspect of language (the meaning of what is being said) and the pragmatics of language (using language appropriately in social situations).
Source: “Pragmatic language impairment”. (2010, October 22). In Wikipedia, The Free Encyclopedia. Retrieved 15:46, November 29, 2010, from http://en.wikipedia.org/w/index.php?title=Pragmatic_language_impairment&oldid=392190031

