ERIC Number: ED179597
Record Type: Non-Journal
Publication Date: 1979-Apr
Reference Count: N/A
Equating Two Forms of a Criterion-Referenced Test by Using Norm Referenced Data: An Illustration of Two Methods.
Garcia-Quintana, Roan A.; Johnson, Lynne M.
Three different computational procedures for equating two forms of a test were applied to a pair of mathematics tests to compare the results of the three procedures. The tests that were being equated were two forms of the SRA Mastery Mathematics Tests. The common, linking test used for equating was the Comprehensive Tests of Basic Skills, Form S, Mathematics Test. The equating sample was a group of 2,039 sixth grade students in the South Carolina Statewide Testing Program. The first equating method, developed by Angoff, involved estimating the mean and variance for each SRA test for the total group, that is, combining the groups that had taken each test, and then computing a conversion equation from one score scale to the other. The second method, also developed by Angoff, involved equating each of the two SRA forms to the equating test. The third method involved finding a prediction equation for each SRA test from the common test and then combining the two prediction equations to form the equating equation. (CTM)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: CTB / McGraw-Hill, Monterey, CA.