Development of the Cognitive Dysfunction Questionnaire (CDQ) in a population based sample
PETER VESTERGREN
Department of Applied Educational Science, Umeå University, Sweden
Search for more papers by this authorMICHAEL RÖNNLUND
Department of Psychology, Umeå University, Sweden
Search for more papers by this authorLARS NYBERG
Department of Radiation Sciences and Integrative Medical Biology, Umeå University, Sweden
Search for more papers by this authorLARS-GÖRAN NILSSON
Department of Psychology, Stockholm University and Stockholm Brain Institute, Sweden
Search for more papers by this authorPETER VESTERGREN
Department of Applied Educational Science, Umeå University, Sweden
Search for more papers by this authorMICHAEL RÖNNLUND
Department of Psychology, Umeå University, Sweden
Search for more papers by this authorLARS NYBERG
Department of Radiation Sciences and Integrative Medical Biology, Umeå University, Sweden
Search for more papers by this authorLARS-GÖRAN NILSSON
Department of Psychology, Stockholm University and Stockholm Brain Institute, Sweden
Search for more papers by this authorAbstract
Vestergren, P., Rönnlund, M., Nyberg, L. & Nilsson, L.-G. (2011). Development of the Cognitive Dysfunction Questionnaire (CDQ) in a population based sample. Scandinavian Journal of Psychology52, 218–228.
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 α 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.
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