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Effect of stimulus context and response coding variables on word retrieval performances in dysphasia
N D Dunn1, S S Russell, S S Drummond
1Department of Communicative Disorders, University of Arkansas, Little Rock 72204.
Journal of Communication Disorders
|June 1, 1989
Summary
The word fluency task is more sensitive than picture-naming for assessing word retrieval in dysphasia. Response time and error analysis effectively differentiate nonfluent and fluent subtypes, aiding diagnosis.
Area of Science:
- Neurolinguistics
- Speech-Language Pathology
Background:
- Dysphasia, characterized by word retrieval deficits, presents with nonfluent and fluent subtypes.
- Accurate assessment of these subtypes is crucial for effective diagnosis and treatment planning.
Purpose of the Study:
- To compare the diagnostic sensitivity of two word retrieval tasks: word fluency and picture-naming.
- To investigate the utility of various response variables (scoring criteria, trial effects, response trends, inaccurate responses) in differentiating dysphasia subtypes.
Main Methods:
- Subjects included nonfluent dysphasic, fluent dysphasic, and non-dysphasic individuals.
- Performance was evaluated on word fluency and picture-naming tasks.
- Data analysis focused on response time, scoring criteria, trial effects, response trends, and inaccurate responses.
Main Results:
- The word fluency task demonstrated significantly higher sensitivity compared to picture-naming.
- Response time emerged as a more discriminating scoring procedure than other criteria.
- Response trends and inaccurate responses provided valuable information for distinguishing between nonfluent and fluent dysphasias.
Conclusions:
- The word fluency task and response time analysis are recommended for improved differential diagnosis of dysphasia subtypes.
- These methods offer insights into language recovery measurement in individuals with dysphasia.