Title An Integrated Approach to Bias in a Longitudinal Survey in the United Kingdom: Assessing Construct, Method, and Item Bias in the General Health Questionnaire (GHQ-12)
Authors BENÍTEZ BAENA, ISABEL, Adams B.G., He J., BENÍTEZ BAENA, ISABEL
External publication No
Means Assessment
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 3.70600
Area International
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85041630566&doi=10.1177%2f1073191117739979&partnerID=40&md5=0e40a69c147491781b1b9f8ef44c7a8f
Publication date 01/01/2019
ISI 000486182500002
Scopus Id 2-s2.0-85041630566
DOI 10.1177/1073191117739979
Abstract Construct, method, and item bias are three levels of measurement bias (i.e., internal bias) essential for valid group comparisons. While many studies often focus on only one level of bias, an integrated perspective on bias is still missing, especially in longitudinal designs. The aim of this study is to address bias in an integrated manner, using four waves of data in the U.K. Longitudinal Household Panel Survey. Responses to the General Health Questionnaire (GHQ-12) from natives and two generations of immigrants were used to analyze the three levels of bias. While the basic structure of the GHQ-12 was stable across groups and time, item and method bias decreased with repeated administrations. Results were confirmed with a sensitivity test. The integrated results allowed for a distinction between temporal sources of bias that became smaller over time and sources affecting valid comparisons persistently. We discuss the implications for mental health assessment. © 2017, The Author(s) 2017.
Keywords article; controlled study; General Health Questionnaire; household; human; human experiment; immigrant; indigenous people; longitudinal study; mental health; United Kingdom
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