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ERIC Number: ED064355
Record Type: RIE
Publication Date: 1972-Apr
Pages: 39
Abstractor: N/A
Reference Count: 0
The Efficiency Index in Item Analysis.
Hoffman, Richard J.
In this paper, a new item analysis index, e, is derived as a function of difficulty and discrimination to represent item efficiency. Item discrimination in this paper is not independent of item difficulty, and it is demonstrated algebraically that the maximum discriminating power of an item may be determined from its difficulty. Item efficiency is defined as the ratio of observed discrimination to maximum discrimination. The e-index will range from zero to unity and will provide additional information for item analyses. Its probability interpretations may provide an attractive psychometric criterion for the retention or rejection of items. (Author)
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A
Note: Paper presented at the annual meeting of the American Educational Research Association (Chicago, Illinois, April 1972)