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Analyzing Multiple Choice Tests with the Rasch Model: Improving Item Calibrations by Deleting Person-Item Mismatches.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gershon, Richard C. |
| Copyright Year | 1995 |
| Abstract | A 1992 study by R. Gershon found discrepancies when comparing the theoretical Rasch item characteristic curve with the average empirical curve for 1,304 vocabulary items administered to 7,711 students. When person-item mismatches were deleted (for any person-item interaction where the ability of the person was much higher or much lower than the difficulty of the item), the difference between the theoretical and empirically produced curves was decreased. This paper describes a replication of that original study, using data obtained from an administration of the California Achievement Test to students in the Minneapolis (Minnesota) public schools. When person-item mismatches were deleted, item calibrations improved regardless of the grade level. The results are discussed with an emphasis on the importance of selectively deleting data when the primary goal of the analysis is to obtain the most accurate item difficulty estimates possible. This research is of particular importance for testing organizations that use item banks or computerized adaptive testing. (Contains one table, six figures, and eight references.) (Author/SLD) ********************************************************************** :.c Reproductions supplied by EDRS are the best that can be made * * from the original document. * *********************************************************************** 00 OO U.S. DEPARTMENT OF EDUCATION Officeppf Educational Research and Improvement EDUQATIONAL RESOURCES INFORMATION CENTER (ERIC) This document has been reproduced as received from the person or organization originating it. Minor changes have been made to improve reproduction quality. Points of view or opinions stated in this document do not necessarily represent official OERI position or policy. PERMISSION TO REPRODUCE AND DISSEMINATE THIS MATERIAL HAS BEEN GRANTED BY kr7-5, Acia,57Atoi TO THE EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) Analyzing Multiple Choice Tests with the Rasch Model: Improving Item Calibrations by Deleting Person-Item Mismatches Richard C. Gershon Betty A. Bergstrom Computer Adaptive Technologies, Inc. William L. Brown Minneapolis Public Schools Paper presented at the annual meeting American Educational Research Association New Orleans, Louisiana April, 1994 BEST COPY AVM _ .BLE |
| File Format | PDF HTM / HTML |
| Volume Number | 1994 |
| Alternate Webpage(s) | https://files.eric.ed.gov/fulltext/ED400282.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
