A competency test was developed to assess students' skills in using electronic library resources. Because all students were required to pass the test, and had multiple opportunities to do so, multiple test forms were desired. Standards had been set on the original form, and minor differences in form difficulty needed to be taken into account. Students were randomly administered one of six new test forms; each form contained the original items and 12 pilot items which were different on each form. The pilot items were then calibrated to the metric of the original items and incorporated in two additional operational forms.
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DeMars, C. (2002, June). Equating multiple forms of a competency test: An item response theory approach. Paper presented at the annual meeting of the Association for Institutional Research, Toronto.