Abstract
Forty-six deaf children ranging in age from 3 to 15 years were given both the Templin-Darley 50 item and 116 item Diagnostic Articulation Tests. Consonants were studied relative to sound position, place of articulation, manner of articulation, voicing, and blend combinations. The data showed trends parallel to those manifested in defective articulation patterns due to organic and functional anomalies. Some of the critical factors were: initial sound position, visibility, phonetic power, neurogenic complexity in producing the phoneme, voicing, hearing level, and age. Vowels were studied relative to age, tongue placement, and tongue height. Trends were similar to those found with consonants. A rank order of articulating errors was suggestive of a maturational programing of most difficult to least difficult sound regardless of etiology.
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