Abstract
In large scale testing programs it is frequently necessary and desirable to have several forms of a test. Multiple forms are essential for admissions tests such as those used for college selection. When used in this way, the test forms are often equated as to convert the raw scores obtained from two forms of the test so that scores derived from the two forms after conversion will be directly equivalent (Angoff, 1971, p. 562). In the case of admissions tests, equating is essential because comparisons are made between persons who take different forms of the test; and without the equating, persons who happened to take a form of the test that was inadvertently more difficult than another form would be at a disadvantage relative to their peers who happened to take the easier form.
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