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A Revised Modified Parallel Analysis (RMPA) for the Construction of Unidimensional Item Pools [microform] / David V. Budescu and Others
Bib ID 5569033
Format BookBook, MicroformMicroform, OnlineOnline
Author
Budescu, David V
 
Online Versions
Description [Washington, D.C.] : Distributed by ERIC Clearinghouse, 1994 
42 p. 
Summary

Modified Parallel Analysis (MPA) is a heuristic method for assessing "approximate unidimensionality" of item pools. It compares the second eigenvalue of the observed correlation matrix with the corresponding eigenvalue extracted from a "parallel" matrix generated by a unidimensional and locally independent model. Revised Modified Parallel Analysis (RMPA) generalizes MPA and alleviates some of its technical limitations. An important and useful feature is a new method for eliminating items which violate the test's unidimensionality. This is achieved by eliminating items, one at a time, to determine their contribution to the matrices' eigenvalues. We propose a test for detecting items with larger impact in the observed data set, and eliminating them. The new method was tested in several situations in which unidimensional item pools were "contaminated" by various proportions of items from a secondary pool. The results indicate that RMPA does an excellent job in detecting low (10%) and moderate (25%) levels of contamination, but fails in cases of maximal (50%) contamination. Eleven tables. (Contains 46 references.) (Author)

Notes

Sponsoring Agency: Office of Naval Research, Arlington, VA.

Contract Number: N00014-91-J-1666.

Contract Number: T-4428034.

ERIC Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (New Orleans, LA, April 5-7, 1994).

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 Equations (Mathematics)  |  Heuristics.  |  Item Analysis.  |  Item Banks.  |  Matrices.  |  Models.  |  Test Construction.  |  Test Content.  |  Test Items.  |  Test Reliability.  |  Revised Modified Parallel Analysis Unidimensionality (Tests)  |  Eigenvalues Modified Parallel Analysis
Form/genre Reports, Evaluative.  |  Speeches/Meeting Papers.
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