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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.
Available From ERIC 
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008 080220s1994    xxu ||| bt    ||| | eng d
035 |9(ericd)ED368780
037 |aED368780|bERIC
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100 1 |aBudescu, David V.
245 1 2 |aA Revised Modified Parallel Analysis (RMPA) for the Construction of Unidimensional Item Pools|h[microform] /|cDavid V. Budescu and Others.
260 |a[Washington, D.C.] :|bDistributed by ERIC Clearinghouse,|c1994.
300 |a42 p.
500 |aSponsoring Agency: Office of Naval Research, Arlington, VA.|5ericd
500 |aContract Number: N00014-91-J-1666.|5ericd
500 |aContract Number: T-4428034.|5ericd
500 |aERIC Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (New Orleans, LA, April 5-7, 1994).|5ericd
520 |aModified 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)
530 |aMay also be available online. Address as at 14/8/18: |uhttps://eric.ed.gov/
533 |aMicrofiche.|b[Washington D.C.]:|cERIC Clearinghouse|emicrofiches : positive.
650 0 7 |aEquations (Mathematics)|2ericd
650 0 7 |aHeuristics.|2ericd
650 0 7 |aItem Analysis.|2ericd
650 1 7 |aItem Banks.|2ericd
650 1 7 |aMatrices.|2ericd
650 0 7 |aModels.|2ericd
650 1 7 |aTest Construction.|2ericd
650 0 7 |aTest Content.|2ericd
650 0 7 |aTest Items.|2ericd
650 0 7 |aTest Reliability.|2ericd
653 1 |aRevised Modified Parallel Analysis|aUnidimensionality (Tests)
653 0 |aEigenvalues|aModified Parallel Analysis
655 7 |aReports, Evaluative.|2ericd
655 7 |aSpeeches/Meeting Papers.|2ericd
856 4 1 |uhttps://eric.ed.gov/?id=ED368780
984 |aANL|cmc 2253 ED368780|d77000000375525
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