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An Examination of the Effect of Multidimensionality on Parallel Forms Construction [microform] / Terry A. Ackerman
Bib ID 5531891
Format BookBook, MicroformMicroform, OnlineOnline
Author
Ackerman, Terry A
 
Online Versions
Description [Washington, D.C.] : Distributed by ERIC Clearinghouse, 1991 
24 p. 
Summary

This paper examines the effect of using unidimensional item response theory (IRT) item parameter estimates of multidimensional items to create weakly parallel test forms using target information curves. To date, all computer-based algorithms that have been devised to create parallel test forms assume that the items are unidimensional. This paper focuses on one such algorithm, which was developed by R. M. Luecht and T. M. Hirsch. Unidimensional item parameter estimates were obtained by calibrating response data generated from two-dimensional item parameters. Using these unidimensional estimates, three sets of test items from a pool of 200 multidimensional items were selected for each of two different test lengths for three differently shaped target information functions. The item parameter estimates were obtained by calibrating five forms of the EAAP Mathematics usage test using the multidimensional IRT calibration program NOHARM. Response data were generated for 2,000 abilities. Observed score differences for each triad, based on the multidimensional item parameters, were then compared. Despite the multidimensionality of the selected items, the created forms appear to be quite parallel both unidimensionally and multidimensionally. Two tables and seven figures are included. (SLD)

Notes

ERIC Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (Chicago, IL, April 1991).

May also be available online. Address as at 14/8/18: https://eric.ed.gov/

Reproduction Microfiche. [Washington D.C.]: ERIC Clearinghouse microfiches : positive. 
Subjects Algorithms.  |  Equations (Mathematics)  |  Estimation (Mathematics)  |  Item Response Theory.  |  Mathematical Models.  |  Scores.  |  Simulation.  |  Test Construction.  |  Test Items.  |  Multidimensionality (Tests) Parallel Test Forms  |  Ability Estimates Information Function (Tests) Item Parameters Unidimensionality (Tests)
Form/genre Reports, Evaluative.  |  Speeches/Meeting Papers.
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