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Feature analysis of segmental errors in children with phonological disorders
1Department of Speech and Hearing Sciences, Indiana University, Bloomington 47405, USA.
Journal of Speech, Language, and Hearing Research : JSLHR
|February 20, 1999
Summary
Children with speech sound disorders, including developmental apraxia of speech (DAS), show consistent patterns in sound substitutions. Feature retention during speech errors may reflect natural phonological acquisition sequences.
Area of Science:
- Speech-Language Pathology
- Developmental Psychology
- Linguistics
Background:
- Developmental apraxia of speech (DAS) is a controversial articulatory disorder.
- Previous research suggested specific feature retention patterns in DAS errors.
- These patterns were thought to differentiate DAS from normal articulation.
Purpose of the Study:
- To re-examine the diagnostic significance of feature retention patterns in speech sound disorders.
- To compare feature retention in children with suspected DAS versus phonological disorders.
- To investigate the relationship between feature retention and phonological knowledge.
Main Methods:
- Analysis of sound substitutions in children with diagnosed phonological disorders.
- Comparison of observed feature retention patterns with prior findings for DAS.
- Correlation of feature retention (voicing, manner, place) with percent correct underlying representation (PCUR).
Main Results:
- Children with phonological disorders exhibited the same feature retention pattern as previously described for DAS.
- Voicing was the most frequently retained feature, followed by manner, then place of articulation.
- An inverse relationship was found between place of articulation retention and phonological knowledge (PCUR).
Conclusions:
- The described feature retention pattern is not unique to DAS and may be characteristic of phonological disorders.
- Place of articulation retention appears inversely related to phonological knowledge, suggesting developmental sequences.
- These findings challenge the diagnostic distinctiveness of specific feature retention patterns for DAS.
