The purpose of this study was to determine whether two parallel tests could be equated effectively (i.e., minimal equating error) using the multidimensional two-parameter IRT model (M2PL). Equatings were performed on both simulated and real data sets using the common-examinee design and two abilities for each examinee (i.e., two dimensions). Item and ability parameter estimates were found using the Multidimensional Item Response Theory Estimation (MIRTE) program developed by Carlson at ACT. The amount of equating error was evaluated by a comparison of the contour plots, response surfaces, and the mean difference and absolute mean difference between the true scores and ability estimates found on both tests for the common examinees used in the equating. / The results indicated that effective equating was possible with the techniques used in this study when true scores, the response surfaces, and the contour plots were compared. When the equating of the ability estimates was examined, unsatisfactory results were found. It was concluded that tests containing more than 40 items would be needed for stable ability estimates. / Source: Dissertation Abstracts International, Volume: 49-06, Section: B, page: 2409. / Major Professor: John R. Hills. / Thesis (Ph.D.)--The Florida State University, 1988.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_76319 |
| Contributors | Hirsch, Thomas Michael., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 103 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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