Interpretation of differential item functioning (DIF) analyses using external review

Neil W Scott; Peter M Fayers; Neil K Aaronson; Andrew Bottomley; Alexander de Graeff; Mogens Grønvold; Chad Gundy; Michael Koller; Morten Aagaard Petersen; Mirjam AG Sprangers

Interpretation of differential item functioning (DIF) analyses using external review

Neil W Scott, Peter M Fayers, Neil K Aaronson, Andrew Bottomley, Alexander de Graeff, Mogens Grønvold, Chad Gundy, Michael Koller, Morten Aagaard Petersen, Mirjam AG Sprangers

6 Citations (Scopus)

Abstract

Differential item functioning (DIF) analyses are used to determine whether certain groups respond differently to a particular item of a test or questionnaire; however, these do not explain the reasons for observed response differences. Many studies have used external reviews of items, sometimes using blinded reviewers, to help interpret these results. The authors conducted a literature review of this topic to describe the current usage of external reviews alongside DIF analyses. It concentrated on studies of health-related quality of life instruments, but studies in other fields were also considered. Relatively few examples of blinded item reviews were identified, and these were mostly from educational studies. A case study using blinded bilingual reviewers alongside translation DIF analyses of a health-related quality of life instrument is described. Future researchers should consider conducting external item reviews alongside DIF analyses.

Original language	English
Journal	Expert Review of Pharmacoeconomics & Outcomes Research
Volume	10
Pages (from-to)	253-258
Number of pages	6
ISSN	1473-7167
Publication status	Published - Jun 2010

Cite this

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title = "Interpretation of differential item functioning (DIF) analyses using external review",

abstract = "Differential item functioning (DIF) analyses are used to determine whether certain groups respond differently to a particular item of a test or questionnaire; however, these do not explain the reasons for observed response differences. Many studies have used external reviews of items, sometimes using blinded reviewers, to help interpret these results. The authors conducted a literature review of this topic to describe the current usage of external reviews alongside DIF analyses. It concentrated on studies of health-related quality of life instruments, but studies in other fields were also considered. Relatively few examples of blinded item reviews were identified, and these were mostly from educational studies. A case study using blinded bilingual reviewers alongside translation DIF analyses of a health-related quality of life instrument is described. Future researchers should consider conducting external item reviews alongside DIF analyses.",

author = "Scott, {Neil W} and Fayers, {Peter M} and Aaronson, {Neil K} and Andrew Bottomley and {de Graeff}, Alexander and Mogens Gr{\o}nvold and Chad Gundy and Michael Koller and Petersen, {Morten Aagaard} and Sprangers, {Mirjam AG}",

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T1 - Interpretation of differential item functioning (DIF) analyses using external review

AU - Scott, Neil W

AU - Fayers, Peter M

AU - Aaronson, Neil K

AU - Bottomley, Andrew

AU - de Graeff, Alexander

AU - Grønvold, Mogens

AU - Gundy, Chad

AU - Koller, Michael

AU - Petersen, Morten Aagaard

AU - Sprangers, Mirjam AG

PY - 2010/6

Y1 - 2010/6

N2 - Differential item functioning (DIF) analyses are used to determine whether certain groups respond differently to a particular item of a test or questionnaire; however, these do not explain the reasons for observed response differences. Many studies have used external reviews of items, sometimes using blinded reviewers, to help interpret these results. The authors conducted a literature review of this topic to describe the current usage of external reviews alongside DIF analyses. It concentrated on studies of health-related quality of life instruments, but studies in other fields were also considered. Relatively few examples of blinded item reviews were identified, and these were mostly from educational studies. A case study using blinded bilingual reviewers alongside translation DIF analyses of a health-related quality of life instrument is described. Future researchers should consider conducting external item reviews alongside DIF analyses.

AB - Differential item functioning (DIF) analyses are used to determine whether certain groups respond differently to a particular item of a test or questionnaire; however, these do not explain the reasons for observed response differences. Many studies have used external reviews of items, sometimes using blinded reviewers, to help interpret these results. The authors conducted a literature review of this topic to describe the current usage of external reviews alongside DIF analyses. It concentrated on studies of health-related quality of life instruments, but studies in other fields were also considered. Relatively few examples of blinded item reviews were identified, and these were mostly from educational studies. A case study using blinded bilingual reviewers alongside translation DIF analyses of a health-related quality of life instrument is described. Future researchers should consider conducting external item reviews alongside DIF analyses.

M3 - Journal article

SN - 1473-7167

VL - 10

SP - 253

EP - 258

JO - Expert Review of Pharmacoeconomics and Outcomes Research

JF - Expert Review of Pharmacoeconomics and Outcomes Research

ER -

Interpretation of differential item functioning (DIF) analyses using external review

Abstract

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