This study investigated the effects of test speededness and context of items on Rasch model parameters. Two questions were formulated for this investigation: "To what extent are the Rasch model parameters affected by partially speeded test administration?" and "To what extent are the Rasch model item difficulty parameters affected by changes in item position and experimental calibration situation?" / The investigations were conducted using data from a mandatory statewide basic skills examination of eighth graders. The effects of test speededness were examined by comparing the Rasch model parameters of samples which were specifically constructed to exhibit various levels of test speededness. Context effects were investigated by longitudinal comparisons of item calibration values obtained in different item positions and experimental versus regular situations. / This research has revealed that the item parameters of a partially speeded test were significantly changed at different levels of speededness. No demonstration of the effects on ability estimates was found. The analyses of context effects showed that item difficulty estimates were affected by changes in item position and calibration situation. / Source: Dissertation Abstracts International, Volume: 43-12, Section: A, page: 3885. / Thesis (Ph.D.)--The Florida State University, 1982.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_74986 |
| Contributors | ORR, CORNELIA SMITH., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 104 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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