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Centre for Policy on Ageing | |
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| Contribution of age, genes, and environment to the relationship between perceptual speed and cognitive ability | | Author(s) | Deborah Finkel, Nancy L Pedersen |
| Journal title | Psychology and Aging, vol 15, no 1, March 2000 |
| Pages | pp 56-64 |
| Keywords | Mental speed ; Cognitive processes ; Mental ageing ; Biological ageing ; Social characteristics [elderly] ; Twins ; Sweden. |
| Annotation | The aims of this study was to examine genetic influences on cognitive ability in adulthood in the context of the relationship between perceptual speed and cognitive ageing. Quantitative genetic analysis of data from the Swedish Adoption /Twin Study of Ageing allowed for estimation of the contribution of age, genetic, and environmental effects to the variance in a latent cognitive factor and to covariance between the cognitive factor and perceptual speed. The sample included 292 pairs of monozygotic and dizygotic twins, both reared together and reared apart, ranging in age from 40 to 84 years. Analysis of components of total variance in the cognitive factor indicated that 90% of the age-related variance in the cognitive factor was shared with perceptual speed and 70% of the genetic variance in the cognitive factor was shared with perceptual speed. The correlation between the speed and cognitive factors was primarily genetically mediated. (RH). |
| Accession Number | CPA-000613406 A |
| Classmark | DG: DA: D6: BH: F: SVR: 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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