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ERIC Number: EJ776854
Record Type: Journal
Publication Date: 2007-Oct
Pages: 7
Abstractor: Author
Reference Count: 29
ISSN: ISSN-1092-4388
Critical Difference Table for Word Recognition Testing Derived Using Computer Simulation
Carney, Edward; Schlauch, Robert S.
Journal of Speech, Language, and Hearing Research, v50 n5 p1203-1209 Oct 2007
Purpose: To construct a table for upper and lower limits of the 95% critical range for changes in word recognition scores obtained with monosyllabic word lists (of lengths 10, 25, 50, and 100 words) using newly available methods. Although such a table has been available for nearly 30 years (A. R. Thornton & M. J. M. Raffin, 1978), the earlier table was constructed by calculation and used an approximation to the variance of the difference score between 2 administrations of word lists of identical size. It has been used clinically, reproduced, and recommended for use by clinicians in handbooks and textbooks. Method: The new table was created using computer simulation of the relevant distributions and a direct estimate of the variance of the difference score between 2 tests, calculated using the simulated results. Results: The new table differed from the previous table in 23% of entries. Critical ranges were both narrowed (82%) and expanded (18%). No range changed by more than 1 word correct in any direction. The original table was most accurate for list sizes of 25 words each. Conclusion: Using the new table will provide more accurate estimates of the 95% critical range for successive administrations of word recognition tests. (Contains 1 figure, 1 table and 4 footnotes.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A