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Prosodic variation across sampling tasks in normal and dysarthric speakers.
A Lowit-Leuschel1, G J Docherty
1Department of Speech and Language Therapy, Strathclyde University, Glasgow, UK. a.lowit@strath.ac.uk
Logopedics, Phoniatrics, Vocology
|June 20, 2002
Summary
This study found that speech task type significantly impacts dysarthric speakers differently than controls. Findings highlight the need to consider task effects in speech disorder assessments.
Area of Science:
- Speech-language pathology
- Neurology
- Linguistics
Background:
- Structured speech elicitation tasks are standard in assessments.
- Growing evidence questions the validity of these tasks for reflecting natural speech.
- Limited research exists on task-based speech variations in disordered populations.
Purpose of the Study:
- To investigate how structured vs. unstructured speech tasks affect prosodic parameters in dysarthric speakers.
- To compare task-related speech performance differences between dysarthric and control groups.
Main Methods:
- Examined ten prosodic parameters.
- Compared performance in reading (structured) and conversation (unstructured) tasks.
- Included 12 individuals with dysarthria and 12 controls.
Main Results:
- The sampling task significantly influenced speech production in dysarthric speakers.
- Task effects differed between the dysarthric and control groups.
- Specific prosodic parameters showed varying sensitivity to task demands.
Conclusions:
- Speech sampling task influences the assessment of dysarthric speakers.
- Current assessment methods may not fully capture natural speech capabilities.
- Recommendations for refining speech assessment protocols are discussed.