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ERIC Number: ED264288
Record Type: Non-Journal
Publication Date: 1984-Dec
Pages: 17
Abstractor: N/A
Reference Count: N/A
The "Average System" - A New Technique for Equating Scores on Different Tests Constructed from an Item Bank.
Doron, Rina
An alternative procedure is examined to compare test scores which does not require the utilization of computers and therefore, can be easily employed by classroom teachers. This technique is called the Average System: a simple way to score examinees using information obtained from a representative sample (or samples). Examinees are ranked on a four point ordinal scale, using information on item difficulty derived from different groups in the representative sample, for estimating average scores of different groups in the population. This system enables comparison of examinees' scores on different tests, constructed out of an item bank. An examinee's score is related to the average appropriate to the test, and an ordinal score assigned. Ordinal scores for different examinees can then be compared without regard to the test used. The validation of the Average System is discussed. Information about item difficulty according to the Rasch model was also derived to permit the validation of the Average System. The criteria for validation is presented and the method to test for item consistency and matching are described. Results indicate that the Rasch Model and the Average System are interchangeable regarding examinee ranking and measurement temporal stability. (PN)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Audience: Researchers
Language: English
Sponsor: N/A
Authoring Institution: N/A