Publication:
Psychological distress across the lifespan: examining age-related item bias in the Kessler-6 Psychological Distress Scale

dc.contributor.author Sunderland, Matthew en_US
dc.contributor.author Hobbs, Megan J. en_US
dc.contributor.author Anderson, Tracy M. en_US
dc.contributor.author Andrews, Gavin en_US
dc.date.accessioned 2021-11-25T12:26:39Z
dc.date.available 2021-11-25T12:26:39Z
dc.date.issued 2012 en_US
dc.description.abstract Background: Old age respondents may systemically differ in their responses to measures of psychological distress over and above their actual latent distress levels when compared to younger respondents. The current study aimed to investigate the potential for age-related bias(es) in the Kessler 6 psychological distress scale (K6) items. Methods: Data from the 2007 Australian National Survey of Mental Health and Wellbeing were analysed using Item Response Theory to detect the presence of item bias in each of the K6 items. The potential for item bias was assessed by systematically comparing young (16-34), middle age (35-64), and old age (65-85) respondents. The significance and magnitude of the item bias between the age groups was assessed using the log-likelihood ratio method of differential item functioning. Results: After statistical adjustment, there were no biases of significant magnitude influencing the endorsement of K6 items between young and middle age respondents or between middle age and old age respondents. There was a bias of significant magnitude present in the endorsement of the K6 item addressing levels of fatigue between young and old age respondents. Conclusions: Despite the identification of significant item bias in the endorsement of K6 items between the age groups, the magnitude and influence of the bias on total K6 scores is likely to have little influence on the overall interpretation of group data when comparing psychological distress across the lifespan. Researchers should take some caution however when examining individual levels of fatigue related to psychological distress in older individuals. en_US
dc.identifier.issn 1041-6102 en_US
dc.identifier.uri http://hdl.handle.net/1959.4/52560
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/au/ en_US
dc.source Legacy MARC en_US
dc.subject.other age comparisons en_US
dc.subject.other Kessler 6 en_US
dc.subject.other item bias en_US
dc.title Psychological distress across the lifespan: examining age-related item bias in the Kessler-6 Psychological Distress Scale en_US
dc.type Journal Article en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.accessRights.uri https://purl.org/coar/access_right/c_abf2
unsw.description.publisherStatement Journal homepage: http://journals.cambridge.org/action/displayJournal?jid=IPG en_US
unsw.identifier.doiPublisher http://dx.doi.org/10.1017/S1041610211001852 en_US
unsw.relation.faculty Medicine & Health
unsw.relation.ispartofissue 2 en_US
unsw.relation.ispartofjournal International Psychogeriatrics en_US
unsw.relation.ispartofpagefrompageto 231-242 en_US
unsw.relation.ispartofvolume 24 en_US
unsw.relation.originalPublicationAffiliation Sunderland, Matthew, Psychiatry, Faculty of Medicine, UNSW en_US
unsw.relation.originalPublicationAffiliation Hobbs, Megan J., Psychiatry, Faculty of Medicine, UNSW en_US
unsw.relation.originalPublicationAffiliation Anderson, Tracy M., Psychiatry, Faculty of Medicine, UNSW en_US
unsw.relation.originalPublicationAffiliation Andrews, Gavin, Psychiatry, Faculty of Medicine, UNSW en_US
unsw.relation.school School of Psychiatry *
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
final peer reviewed version.pdf
Size:
293.33 KB
Format:
application/pdf
Description:
Resource type