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Centre for Policy on Ageing | |
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Longitudinal invariance of adult psychometric ability
— factor structures across 7 years | | Author(s) | K Warner Schaie, Scott B Maitland, Sherry L Willis |
| Journal title | Psychology and Aging, vol 13, no 1, March 1998 |
| Pages | pp 8-20 |
| Keywords | Cognitive processes ; Memory and Reminiscence ; Evaluation ; Older people ; Adults ; Longitudinal surveys ; United States of America. |
| Annotation | Research on the ageing of intellectual competence has tended to focus on the comparison of performance levels between different age groups and within samples as they age across time. However, the internal validity of such comparisons have been subject to extensive discussions. This study examined the hypothesis that psychometric tests retain equivalent factor structures across a 7-year interval, in a sample of 984 persons divided into six age groups. The participants were assessed in 1984 and 1991 as part of the Seattle Longitudinal Study. A best fitting measurement model was estimated for 20 psychometric tests marking the six primary abilities of inductive reasoning, spatial orientation, perceptual speed, numeric facility, verbal ability, and verbal recall. Gender-partitioned values indicate gender differences in the observed variables. Results showed weak factorial invariance over time for all cohorts. Configural invariance could be demonstrated across all cohort groups. However, weak factorial invariance across groups could be accepted for all but the youngest and oldest groups. Latent means were modelled for the accepted solutions across time and cohort groups. (AKM). |
| Accession Number | CPA-980708402 A |
| Classmark | DA: DB: 4C: B: SD: 3J: 7T |
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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