ERIC Number: ED230582
Record Type: RIE
Publication Date: 1983-Apr
Reference Count: 0
The Effect of Item Format on Item Difficulty and Item Discrimination.
Tollefson, Nona; Tripp, Alice
This study compared the item difficulty and item discrimination of three multiple choice item formats. The multiple choice formats studied were: a complex alternative (none of the above) as the correct answer; a complex alternative as a foil, and the one-correct answer format. One hundred four graduate students were randomly assigned to complete one of three forms of a multiple choice test. Statistical concepts were the content of the test. Analysis of variance showed significant mean differences in the item discrimination indices for the three item formats. Items having "none of the above" as the correct answer had a significantly higher mean discrimination index than the other two item formats. There was no significant difference in the mean item difficulties for the three item formats. (Author)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers: Complex Response Alternatives; Item Discrimination (Tests)
Note: Paper presented at the Annual Meeting of the American Educational Research Association (67th, Montreal, Quebec, April 11-15, 1983).