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Centre for Policy on Ageing | |
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| Effects of repeated testing in a longitudinal age-homogeneous study of cognitive aging | | Author(s) | Valgeir Thorvaldsson, Scott M Hofer, Stig Berg |
| Journal title | Journals of Gerontology: Series B, Psychological Sciences and Social Sciences, vol 61B, no 6, November 2006 |
| Pages | pp P348-P354 |
| Source | http://www.geron.org |
| Keywords | Cognitive processes ; Mental ageing ; Learning capacity ; Evaluation ; Longitudinal surveys ; Sweden. |
| Annotation | Estimates of gain relating to repeated test exposure (retest effects) and within-person cognitive changes are confounded in most longitudinal studies because of non-independent time structures underlying both processes. Recently developed statistical approaches rely on between-person age differences to estimate effects of repeated testing. This study, however, demonstrates how retest effects can be evaluated at the group level in an age-homogeneous population-based study by use of a sampling-based design approach in which level and change of cognitive performance of previous participants measured at ages 70, 75, 79, 81, 85, 88, 90, 92, 95, 97 and 99 were compared with performances of survivors of a representative sample identified and drawn from the same original population cohort but invited for the first time at age 85 with subsequent measures at ages 88, 90, 92, 95, 97 and 99. The comparison revealed a trend towards retest effects on two of the five cognitive measurements. The study demonstrates how a design-based approach can provide valuable insight into continuous learning processes. (RH). |
| Accession Number | CPA-070216203 A |
| Classmark | DA: D6: DE: 4C: 3J: 76P |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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