USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING

Bibliographic Details
Main Author:	O'Brien, Erin L.
Language:	English
Published:	Wright State University / OhioLINK 2014
Subjects:	Psychology Item response theory Differential item functioning
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=wright1421955213

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-wright14219552132021-08-03T06:29:05Z USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING O'Brien, Erin L. Psychology Item response theory Differential item functioning Current studies of differential item functioning (DIF) look at look at how groups differ in responding to items across an entire trait continuum. This is important for detecting the presence of consistent patterns of responses across items between groups of people. Current tests of DIF are limited in that they only detect differences between groups across all levels of the trait. However, selection decisions are usually made within specific ranges of trait levels. The purpose of this research was to determine if restricting theta values in an existing framework would be better at detecting DIF as current methods for restricted ranges of the trait continuum. This Monte Carlo study used a 3 (difficulty DIF) by 4 (discrimination DIF) by 2 (canceling versus noncanceling DIF) design. Traditional differential functioning of items and tests (DFIT) framework analyses were used and then rerun using the targeted ranges of theta. The targeted ranges were defined as the 100 lowest and 100 highest theta values. Type I error rates and power analyses were examined. Results indicate that it is possible to detect DIF accurately at specific trait levels when DIF was not detected across the entire range of theta values. This research has implications for using cut scores at particular levels of a trait for items that have not been assessed using the new, targeted ranges. Limitations and future research are discussed. 2014 English text Wright State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=wright1421955213 http://rave.ohiolink.edu/etdc/view?acc_num=wright1421955213 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Psychology Item response theory Differential item functioning
spellingShingle	Psychology Item response theory Differential item functioning O'Brien, Erin L. USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
author	O'Brien, Erin L.
author_facet	O'Brien, Erin L.
author_sort	O'Brien, Erin L.
title	USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
title_short	USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
title_full	USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
title_fullStr	USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
title_full_unstemmed	USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING
title_sort	using differential functioning of items and tests (dfit) to examine targeted differential item functioning
publisher	Wright State University / OhioLINK
publishDate	2014
url	http://rave.ohiolink.edu/etdc/view?acc_num=wright1421955213
work_keys_str_mv	AT obrienerinl usingdifferentialfunctioningofitemsandtestsdfittoexaminetargeteddifferentialitemfunctioning
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USING DIFFERENTIAL FUNCTIONING OF ITEMS AND TESTS (DFIT) TO EXAMINE TARGETED DIFFERENTIAL ITEM FUNCTIONING

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