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The need to capture meaningfully the sound of speech based on detailed phonetic analysis is argued. Also described are some of the differences in measuring speech for clinical, audit and research activities. Blind independent analysis of speech data by specialist therapists is recommended as the gold standard methodological approach when reporting audit and research outcomes. The requirement for ongoing training in listening skills for specialist therapists is advocated. The limitations of an impairment-based-only approach to measurement are also illustrated, indicating the need to develop outcome measures that incorporate more functional issues that affect quality of life.
Debbie Sell (Sat,) studied this question.