Publication:
An evaluation of computerized adaptive testing for general psychological distress: combining GHQ-12 and Affectometer-2 in an item bank for public mental health research

dc.contributor.other Behavioural Ecology and Ecophysiology (BECO)
dc.date.accessioned 2019-04-26T08:57:29Z
dc.date.available 2019-04-26T08:57:29Z
dc.date.issued 20/05/16
dc.description Background: Recent developments in psychometric modeling and technology allow pooling well-validated items from existing instruments into larger item banks and their deployment through methods of computerized adaptive testing (CAT). Use of item response theory-based bifactor methods and integrative data analysis overcomes barriers in cross-instrument comparison. This paper presents the joint calibration of an item bank for researchers keen to investigate population variations in general psychological distress (GPD). Methods: Multidimensional item response theory was used on existing health survey data from the Scottish Health Education Population Survey (n = 766) to calibrate an item bank consisting of pooled items from the short common mental disorder screen (GHQ-12) and the Affectometer-2 (a measure of ΓÇ£general happinessΓÇ¥). Computer simulation was used to evaluate usefulness and efficacy of its adaptive administration. Results: A bifactor model capturing variation across a continuum of population distress (while controlling for artefacts due to item wording) was supported. The numbers of items for different required reliabilities in adaptive administration demonstrated promising efficacy of the proposed item bank. Conclusions: Psychometric modeling of the common dimension captured by more than one instrument offers the potential of adaptive testing for GPD using individually sequenced combinations of existing survey items. The potential for linking other item sets with alternative candidate measures of positive mental health is discussed since an optimal item bank may require even more items than these.
dc.ejemplo3.0.ejem Stochl, Jan
dc.ejemplo3.0.ejem B├╢hnke, Jan R
dc.ejemplo3.0.ejem Pickett, Kate E
dc.ejemplo3.0.ejem Croudace, Tim J
dc.identifier.uri https://demo7.dspace.org/handle/10673/476
dc.language en
dc.publisher.program BioMed Central
dc.title An evaluation of computerized adaptive testing for general psychological distress: combining GHQ-12 and Affectometer-2 in an item bank for public mental health research
dspace.entity.type Publication
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relation.isAuthorOfPublication 374452ae-27ee-4450-a8f6-58533b713203
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relation.isProjectOfPublication 0dcb7c8d-6f05-4560-ad74-4f69c3e63765
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