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An evaluation of a new method of IRT...

Ragland, Shelley.

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An evaluation of a new method of IRT scaling.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	An evaluation of a new method of IRT scaling./
Author:	Ragland, Shelley.
Description:	154 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3397.
Contained By:	Dissertation Abstracts International71-05B.
Subject:	Education, Tests and Measurements. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3403047
ISBN:	9781109760606

An evaluation of a new method of IRT scaling.
Ragland, Shelley.

An evaluation of a new method of IRT scaling. - 154 p.

Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3397.

Thesis (Ph.D.)--James Madison University, 2010.

In order to be able to fairly compare scores derived from different forms of the same test within the Item Response Theory framework, all individual item parameters must be on the same scale. A new approach, the RPA method, which is based on transformations of predicted score distributions was evaluated here and was shown to produce results comparable to the widely used Stocking-Lord (SL) method under varying conditions of test length, number of common items, and differing ability distributions in a simulation study. The new method was also examined using actual student data and a resampling analysis. Both the simulation study and actual student data study resulted in very similar transformation constants for the RPA and SL methods when 15 or 10 common items were used. However, the RPA method produced greater variance, especially when only 5 common items were used in the actual student data analysis compared to the SL method. The simulated and actual data research findings demonstrate that the RPA method is a viable option for producing the transformation constants necessary for transforming separately calibrated item parameter estimates prior to equating.

ISBN: 9781109760606Subjects--Topical Terms:

1017589
Education, Tests and Measurements.

An evaluation of a new method of IRT scaling.
LDR:02187nam 2200313 4500 001 1403943
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020 $a 9781109760606
035 $a (UMI)AAI3403047
035 $a AAI3403047
040 $a UMI $c UMI
100 1 $a Ragland, Shelley. $3 1683238
245 1 3 $a An evaluation of a new method of IRT scaling.
300 $a 154 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-05, Section: B, page: 3397.
500 $a Adviser: Christine DeMars.
502 $a Thesis (Ph.D.)--James Madison University, 2010.
520 $a In order to be able to fairly compare scores derived from different forms of the same test within the Item Response Theory framework, all individual item parameters must be on the same scale. A new approach, the RPA method, which is based on transformations of predicted score distributions was evaluated here and was shown to produce results comparable to the widely used Stocking-Lord (SL) method under varying conditions of test length, number of common items, and differing ability distributions in a simulation study. The new method was also examined using actual student data and a resampling analysis. Both the simulation study and actual student data study resulted in very similar transformation constants for the RPA and SL methods when 15 or 10 common items were used. However, the RPA method produced greater variance, especially when only 5 common items were used in the actual student data analysis compared to the SL method. The simulated and actual data research findings demonstrate that the RPA method is a viable option for producing the transformation constants necessary for transforming separately calibrated item parameter estimates prior to equating.
590 $a School code: 1357.
650 4 $a Education, Tests and Measurements. $3 1017589
650 4 $a Psychology, Psychometrics. $3 1017742
690 $a 0288
690 $a 0632
710 2 $a James Madison University. $b Graduate Psychology-Assessment and Measurement. $3 1683237
773 0 $t Dissertation Abstracts International $g 71-05B.
790 1 0 $a DeMars, Christine, $e advisor
790 1 0 $a Anderson, Robin $e committee member
790 1 0 $a Goodman, Joshua $e committee member
790 1 0 $a Pashley, Peter J. $e committee member
790 $a 1357
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3403047