Evaluation of barriers to expression.
D002648:Child; D002663:Child Language; D002675:Child, Preschool; D003142:Communication; D003937:Diagnosis, Differential; D006801:Humans; D007806:Language Disorders / Q000175:diagnosis* / Q000534:rehabilitation; D010700:Phonetics; D012660:Semantics; D013062:Speech Articulation Tests; D013064:Speech Disorders / Q000175:diagnosis; D013065:Speech Intelligibility; D013067:Speech Perception