Differential Item Function Amplification and Cancellation

Name: Differential Item Function Amplification and Cancellation
Brand: VDM Verlag
SKU: 9783639165494
Price: 70.42 EUR
Availability: InStock

Автор: Han Bao

Език:

Корици: С меки корици

Издател: VDM Verlag

Наличност: Налично при издателя, по поръчка

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Many educational tests use testlets as a way of §providing context. When testlet effect and item §id...

Информация за книгата

Автор

Han Bao

Език

Английски език

Корици

Книга - С меки корици

Издадена

2009

страници

176

EAN

9783639165494

ISBN

3639165497

Enbook ID

06824940

Издател

VDM Verlag

Теглоt

268

Размери

152 x 229 x 10

Пълно описание

Many educational tests use testlets as a way of §providing context. When testlet effect and item §idiosyncratic features of individual items are both §considered to be the reasons of DIF in many §educational tests using testlets, it is interesting §to investigate the phenomena of DIF amplification §and cancellation resulting from the interactive §effects of these two factors. This research §presented a study based on a multiple-group §testlet item response theory model 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 method. The simulation study §investigated all of the possible conditions of DIF §amplification and cancellation. 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 such as gender or ethnicity.

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Differential Item Function Amplification and Cancellation

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