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Tracking change in children with severe and persisting speech difficulties.
Elisabeth Joy Newbold1, Joy Stackhouse, Bill Wells
1Department of Human Communication Sciences, University of Sheffield, Sheffield S10 2TA, UK. e.j.newbold@shef.ac.uk
Clinical Linguistics & Phonetics
|May 9, 2013
Summary
Standardised tests like whole-word accuracy may not detect speech changes in children with severe and persisting speech difficulties (SPSD). Percentage of consonants correct (PCC) and whole-word proximity (PWP) show more promise for evaluating speech outcomes.
Area of Science:
- Speech-language pathology
- Developmental psychology
- Linguistics
Background:
- Standardised tests of whole-word accuracy are common in speech pathology and developmental psychology.
- These tests may lack sensitivity for measuring speech changes in children with severe and persisting speech difficulties (SPSD).
Purpose of the Study:
- To compare commonly used perceptual phonological and phonetic analysis procedures.
- To identify sensitive measures for tracking speech changes in children with SPSD.
Main Methods:
- Compared percentage of whole words correct (PWC), percentage of consonants correct (PCC), proportion of whole-word proximity (PWP), phonological pattern analysis, and phonetic inventory analysis.
- Analyzed data from four children with SPSD, aged 4 and 6 years, using naming and repetition tasks.
Main Results:
- PWC only captures change with identical stimuli across time points.
- PCC is a robust indicator of change, less affected by stimulus choice.
- PWP captures change across time and tasks, potentially more sensitive to psycholinguistic variables than PCC.
Conclusions:
- PCC and PWP are potentially useful tools for evaluating speech outcomes in children with SPSD.
- These measures offer greater sensitivity than traditional whole-word accuracy tests for this population.
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