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Investigating differential item func...

Bao, Han.

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Investigating differential item function amplification and cancellation in application of item response testlet models.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Investigating differential item function amplification and cancellation in application of item response testlet models./
Author:	Bao, Han.
Description:	209 p.
Notes:	Adviser: C. Mitchell Dayton.
Contained By:	Dissertation Abstracts International68-11A.
Subject:	Education, Tests and Measurements. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3283409
ISBN:	9780549327158

Investigating differential item function amplification and cancellation in application of item response testlet models.
Bao, Han.

Investigating differential item function amplification and cancellation in application of item response testlet models. - 209 p.

Adviser: C. Mitchell Dayton.

Thesis (Ph.D.)--University of Maryland, College Park, 2007.

Many educational tests use testlets as a way of providing context, instead of presenting only discrete multiple-choice items, where items are grouped into testlets (Wainer & Kiely, 1987) or item bundles (Rosenbaum, 1988) marked by shared common stimulus materials. One might doubt the usual assumption of standard item response theory of local independence among items in these cases. Plausible causes of local dependence might be test takers' different levels of background knowledge necessary to understand the common passage, as a considerable amount of mental processing may be required to read and understand the stimulus, and different persons' learning experiences. Here, the local dependence can be viewed as additional dimensions other than the latent traits. Furthermore, from the multidimensional differential item functioning (DIF) point of view, different distributions of testlet dimensions among different examinee subpopulations (race, gender, etc) could be the cognitive cause of individual differences in test performance. When testlet effect and item idiosyncratic features of individual items are both considered to be the reasons of DIF, it is interesting to investigate the phenomena of DIF amplification and cancellation resulting from the interactive effects of these two factors.

ISBN: 9780549327158Subjects--Topical Terms:

1017589
Education, Tests and Measurements.

Investigating differential item function amplification and cancellation in application of item response testlet models.
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020 $a 9780549327158
035 $a (UMI)AAI3283409
035 $a AAI3283409
040 $a UMI $c UMI
100 1 $a Bao, Han. $3 1267182
245 1 0 $a Investigating differential item function amplification and cancellation in application of item response testlet models.
300 $a 209 p.
500 $a Adviser: C. Mitchell Dayton.
500 $a Source: Dissertation Abstracts International, Volume: 68-11, Section: A, page: 4679.
502 $a Thesis (Ph.D.)--University of Maryland, College Park, 2007.
520 $a Many educational tests use testlets as a way of providing context, instead of presenting only discrete multiple-choice items, where items are grouped into testlets (Wainer & Kiely, 1987) or item bundles (Rosenbaum, 1988) marked by shared common stimulus materials. One might doubt the usual assumption of standard item response theory of local independence among items in these cases. Plausible causes of local dependence might be test takers' different levels of background knowledge necessary to understand the common passage, as a considerable amount of mental processing may be required to read and understand the stimulus, and different persons' learning experiences. Here, the local dependence can be viewed as additional dimensions other than the latent traits. Furthermore, from the multidimensional differential item functioning (DIF) point of view, different distributions of testlet dimensions among different examinee subpopulations (race, gender, etc) could be the cognitive cause of individual differences in test performance. When testlet effect and item idiosyncratic features of individual items are both considered to be the reasons of DIF, it is interesting to investigate the phenomena of DIF amplification and cancellation resulting from the interactive effects of these two factors.
520 $a This dissertation presented a study based on a multiple-group testlet item response theory model developed by Li et al. (2006) to examine in detail different situations of DIF amplification and cancellation at the item and testlet level using testlet characteristic curve procedures with signed/unsigned area indices and logistic regression procedure. The testlet DIF model was estimated using a hierarchical Bayesian framework with the Markov Chain Monte Carlo (MCMC) method implemented in the computer software WINBUGS. The simulation study investigated all of the possible conditions of DIF amplification and cancellation attributed to person-testlet interaction effect and individual item characteristics. Real data analysis indicated the existence of testlet effect and its magnitudes of difference on the means and/or variance of testlet distribution between manifest groups imputed to the different contexts or natures of the passages as well as its interaction with the manifest groups of examinees such as gender or ethnicity.
590 $a School code: 0117.
650 4 $a Education, Tests and Measurements. $3 1017589
650 4 $a Psychology, Psychometrics. $3 1017742
650 4 $a Statistics. $3 517247
690 $a 0288
690 $a 0463
690 $a 0632
710 2 $a University of Maryland, College Park. $b Measurement, Statistics and Evaluation. $3 1267183
773 0 $t Dissertation Abstracts International $g 68-11A.
790 $a 0117
790 1 0 $a Dayton, C. Mitchell, $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3283409