Comparison of IRT observed score equating methods for CR items under the common-item nonequivalent groups design

2021 ◽  
Vol 34 (3) ◽  
pp. 565-585
Author(s):  
Yoon Ah Song ◽  
Jiwon Choi
Keyword(s):  
Common Item ◽  
Nonequivalent Groups ◽  
The Common ◽  
Observed Score

A Note on Levine’s Formula for Equating Unequally Reliable Tests Using Data From the Common Item Nonequivalent Groups Design

1991 ◽  
Vol 16 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Bradley A. Hanson
Keyword(s):  
Linear Function ◽  
Method Of Moments ◽  
Test Score ◽  
First Order ◽  
Common Item ◽  
Nonequivalent Groups ◽  
The Common ◽  
Using Data ◽  
Observed Score ◽  
True Scores

Levine’s formula for equating unequally reliable tests using data collected in the common item nonequivalent groups equating design is an estimate of a linear function relating true scores on two test forms to be equated. Because a function relating true scores is applied to the observed score, it is not clear how the resulting converted observed score is in any sense comparable to the observed score it is being equated to. This article demonstrates that Levine’s formula can be interpreted as a method of moments estimate of an equating function that results in first order equity of the equated test score under a classical congeneric model.

A Comparison of Bootstrap Standard Errors of IRT Equating Methods for the Common-Item Nonequivalent Groups Design

2001 ◽  
Vol 14 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Tsung-Hsun Tsai ◽  
Bradley A. Hanson ◽  
Michael J. Kolen ◽  
and Robert A. Forsyth
Keyword(s):  
Standard Errors ◽  
Common Item ◽  
Nonequivalent Groups ◽  
The Common ◽  
Irt Equating

scholarly journals Effects of Equating Strains on Equating Error in the Common-Item Nonequivalent Groups Design

2002 ◽  
Vol 5 (1) ◽  
pp. 119-132
Author(s):  
Jae-Chun Ban ◽  
Bradley A. Hanson ◽  
Deborah J. Harris
Keyword(s):  
Common Item ◽  
Nonequivalent Groups ◽  
The Common ◽  
Equating Error
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