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Development of the cognitive dysfunction questionnaire (CDQ) in a population based sample
Umeå University, Faculty of Social Sciences, Department of applied educational science.ORCID iD: 0000-0003-1442-3939
Umeå University, Faculty of Social Sciences, Department of Psychology.
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Diagnostic Radiology. Umeå University, Faculty of Medicine, Department of Integrative Medical Biology (IMB), Physiology.
Department of Psychology, Stockholm University and Stockholm Brain Institute, Sweden.
2011 (English)In: Scandinavian Journal of Psychology, ISSN 0036-5564, E-ISSN 1467-9450, Vol. 52, no 3, 218-228 p.Article in journal (Refereed) Published
Abstract [en]

The study reports on the development of a questionnaire for assessment of adult cognitive dysfunction (CDQ). Participants in a population-based sample(65 ± 15 years, N = 370) responded to a 90-item pilot version covering multiple aspects of memory/cognition. Based on exploratory principal components analyses and correlations with criterion measures of cognitive functioning (MMSE, Block Design, semantic/episodic memory), 20 items loading on 6 components were selected for the final version of the questionnaire. Cronbach’s a for the total score was 0.90. There was evidence of construct validity as judged by correlations between CDQ scores, objective cognitive measures, and a subjective memory measure (PRMQ). Discriminant validity was demonstrated by a low and non-significant correlation with depressive symptoms. Further evidence of construct validity was provided by correlations with age and educational attainment. In conclusion, the CDQ is promising as a self-rating screening tool for cognitive dysfunction, and will be the subject of further development and validation.

Place, publisher, year, edition, pages
Stockholm: Almqvist & Wiksell , 2011. Vol. 52, no 3, 218-228 p.
Keyword [en]
Questionnaire development, subjective memory, self-report measures, cognitive functioning, cognitive dysfunction, cognitive impairment.
National Category
Psychology Other Social Sciences not elsewhere specified
Research subject
Psychology; didactics of educational measurement
Identifiers
URN: urn:nbn:se:umu:diva-38304DOI: 10.1111/j.1467-9450.2010.00861.xOAI: oai:DiVA.org:umu-38304DiVA: diva2:374271
Available from: 2010-12-03 Created: 2010-12-03 Last updated: 2017-12-12Bibliographically approved
In thesis
1. On the subjective–objective distinction for measures of memory and cognition: Theoretical and methodological issues in questionnaire development and validation
Open this publication in new window or tab >>On the subjective–objective distinction for measures of memory and cognition: Theoretical and methodological issues in questionnaire development and validation
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The aim of this thesis was to develop a questionnaire for cognitive functioning, which could possibly be used as a screening instrument for early signs of dementia in the future. The introduction discusses the often made distinction between subjective and objective measures. A background to the four articles is provided, focussing on findings of weak relationships between self-report- and laboratory measures of memory/cognition. Studies I and II provided results and conclusions that guided instrument development and validation in Studies III and IV. All studies were based on data from participants in the Betula Prospective Cohort Study. Study I investigated predictors of scores on an established self-report instrument for memory failures (PRMQ). Candidate predictors were memory performance on laboratory tests, age, depressive symptoms, and personality traits. There was no relation to age, and test performance did not predict self-reported memory, but depressive symptoms and personality did. Given the finding of a lack of a relation to age, and a bulk of research articles claiming that memory complaints are common in the elderly or increase with age, Study II used a global rating of problems with memory, and reports of perceived causes. In contrast to Study I, problems ratings were related to age, such that increasing age meant higher severity of problems. Furthermore, perceived causes of memory problems differed across age. The elderly reported aging while the young reported stress and multitasking as primary causes. With these results as a background, the purpose of Study III was to develop a new instrument (the Cognitive Dysfunction Questionnaire - CDQ) with the explicit aim that scores should be related to laboratory test performance. A global construct of cognitive functioning with an emphasis on memory systems was adopted, and an item pool was generated. Based on exploratory principal components analysis and correlations with criterion measures (laboratory test performance), twenty items in six domains were selected. Preliminary psychometric evidence showed that the CDQ was reliable, and related to age and objective measures, but not to depressive symptoms. In Study IV, twenty additional items were constructed, and the CDQ was responded to by participants in independent samples. Confirmatory factor analysis was used to test the factor structure derived from Study III, and refinement was undertaken by collapse of two domains and exclusion of items. The final factor structure was cross-validated. Competing models and measurement invariance across age and sex was tested. Psychometric properties were investigated for the final 20-item version.

Place, publisher, year, edition, pages
Umeå: Department of Applied Educational Science, 2011. 52 p.
Series
Academic dissertations at the department of Educational Measurement, ISSN 1652-9650 ; 7
Keyword
cognitive dysfunction, measurement, memory complaints, self report, subjective memory, subjective–objective
National Category
Other Social Sciences not elsewhere specified
Research subject
didactics of educational measurement
Identifiers
urn:nbn:se:umu:diva-46076 (URN)978-91-7459-271-9 (ISBN)
Public defence
2011-09-30, Hörsal 1031, Norra beteendevetarhuset, Umeå Universitet, Umeå, 10:00 (Swedish)
Opponent
Supervisors
Available from: 2011-09-09 Created: 2011-08-25 Last updated: 2014-12-02Bibliographically approved

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