ERIC Number: ED389713
Record Type: RIE
Publication Date: 1988-Jun
Reference Count: N/A
An Empirical Investigation of One Variable Section Pre-Equating.
Wightman, Linda F.; Wightman, Lawrence E.
Section Pre-Equating (SPE) is a method used to equate test forms that consist of multiple separately timed sections. SPE does not require examinees to take two complete forms of the test. Instead, all of the old form and one or two sections of the new form are administered to each examinee, and missing data techniques are employed to estimate the necessary equating parameters. When a test includes only one variable section, there is no simple way to obtain an estimate of the correction between pairs of sections from the new test because no group takes a pair of sections. This study evaluated several methods for obtaining reasonable values for these correlations. Methods evaluated included borrowing correlations from another population that took the test at a different administration, borrowing correlation from another parallel test, and imputing the unknown partial correlations. Samples were drawn from existing data for the Graduate Management Admission Test. Comparison of the converted scores obtained using the three different methods showed them to be consistent with one another. Results also demonstrated that equating results from the one-variable section test model were very consistent with those obtained from a two-variable section test model. An appendix presents section correlations. (Contains 8 references, 10 tables, and 12 figures.) (Author/SLD)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: Educational Testing Service, Princeton, NJ.
Identifiers: Graduate Management Admission Test; Missing Data; Parallel Test Forms