Articulation Disorders

Articulation refers to the verbal production of speech sounds. An articulation disorder is a speech sound disorder characterized by sound omissions, substitutions, or additions which make the speaker difficult to understand. (Ex: saying /f/ for “th”, /y/ for l). Articulation disorders may be caused by abnormal oral structures or weakness. Learning to talk is a difficult task and speech sound errors during the early years is normal.  If speech errors occur past the age of five, a child may have an articulation disorder and benefit from a screening or evaluation by a Speech-Language Pathologist. 

(Reference: www.asha.org)

http://www.asha.org/public/speech/disorders/SpeechSoundDisorders/#what_are_dis
http://www.kidspeech.com/index.php?option=com_content&view=article&id=46&Itemid=492
http://mommyspeechtherapy.com/?page_id=55