ERIC Number: ED129904
Record Type: RIE
Publication Date: 1976-Apr
Reference Count: 0
The Accuracy of Three Approximations for Test Reliability.
Kleinke, David J.
Data from 200 college-level tests were used to compare three reliability approximations (two of Saupe and one of Cureton) to Kuder-Richardson Formula 20 (KR20). While the approximations correlated highly (about .9) with the reliability estimate, they tended to be underapproximations. The explanation lies in an apparent bias of Lord's approximation to the standard error of measurement. Until further investigation is completed, it is suggested that these approximations be used only for comparisons among tests of similar average relative difficulty. (Author/RC)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: N/A
Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (San Francisco, California, April 19-23, 1976)