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- W235672705 abstract "Whether the presence of bidimensionality has any effect on the adaptive recalibration of test items was studied through live-data simulation of computer adaptive testing (CAT) forms. The scurce data were examinee responses to the 298 scored multiple choice items of a licensure examination in a health care profession. Three 75-item part-forms, differing in the degree of bidimensionality, were constructed from the examination forms. The dimensionality of each item was determ:ned based on principal factor loadings using W. F. Stout's (1987) procedure. Samples of 2,100 examinees from an U.S.-educated group and a predominantly foreign-educated group were used, with samples sizes of 100, 200, 400, and 1,000 used for the analyses. As expected, an increase in sample size resulted in greater agreement between calibration and bank b-values. It appeared that dimensionality affected adaptive recalibration. Results from this study varied depending on the dimensionality of the part-forms. Results also affirm the importance of a well-defined reference group for recalibration, since samples from varying ability ranges sometimes produced considerably different b-values. Three tables present details of the analyses. (Contains six references.) (SLD) *********************************************************************** Reproductions supplied by EDRS are the best that can be made from the original document. * *********************************************************************** U S DEPARTMENT OF EDUCATION Office of t ducar,onal Research a nd !rnproceineni EDU IONAl RE SOURCES INFORMATION CE NTE R tERIC) ThiS document has Peen repinclut ed as er eived from the person or organitatinn originatiny ii t Minor changes have been rn,,de II, improve reprocluClion Qualify Points of view or Opinions stated in I his Jix u merit do not necessarily represent olticia. OF RI position of policy PERMISSION TO REPRODUCE THIS MATERIAL HAS BEEN GRANTED BY 5->ilijE-5 TO THE EDUCATIONAL RESOURCES INFORMATION CENTER (ERIC) The Estimation of Item Difficulty from Restricted CAT Calibration Samples Robert C. Sykes Kyoko Ito" @default.
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- W235672705 date "1995-04-19" @default.
- W235672705 modified "2023-09-27" @default.
- W235672705 title "The Estimation of Item Difficulty from Restricted CAT Calibration Samples" @default.
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