TY - JOUR
T1 - Critical difference table for word recognition testing derived using computer simulation
AU - Carney, Edward
AU - Schlauch, Robert S.
PY - 2007/10/1
Y1 - 2007/10/1
N2 - 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.
AB - 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.
KW - Audiology
KW - Clinical tests
KW - Computer programming
KW - Speech discrimination testing
KW - Tables
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U2 - 10.1044/1092-4388(2007/084)
DO - 10.1044/1092-4388(2007/084)
M3 - Article
C2 - 17905906
AN - SCOPUS:35948960381
SN - 1092-4388
VL - 50
SP - 1203
EP - 1209
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 5
ER -