Cohort differences in trajectories of cognitive aging

被引:60
作者
Finkel, Deborah [1 ]
Reynolds, Chandra A. [2 ]
McArdle, John J. [3 ]
Pedersen, Nancy L. [3 ,4 ]
机构
[1] Indiana Univ SE, Sch Social Sci, New Albany, IN 47150 USA
[2] Univ Calif Riverside, Dept Psychol, Riverside, CA 92521 USA
[3] Univ So Calif, Dept Psychol, Los Angeles, CA 90089 USA
[4] Karolinska Inst, Dept Med Epidemiol & Biostat, S-10401 Stockholm, Sweden
来源
JOURNALS OF GERONTOLOGY SERIES B-PSYCHOLOGICAL SCIENCES AND SOCIAL SCIENCES | 2007年 / 62卷 / 05期
关键词
D O I
10.1093/geronb/62.5.P286
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
To separate age and cohort effects on decline in normal cognitive aging, we applied growth curve models to longitudinal data from the Swedish Adoption/Twin Study of Aging. Data from up to five measurement waves covering a 16-year period were available from 806 participants (age 50 to 88 at the first wave). We divided the sample into two cohorts by birth year: 1900-1925 and 1926-1948. We generated components to tap four cognitive domains: verbal and spatial ability, memory, and speed. We tested cohort differences by using two growth models: quadratic and two linear slopes. Results indicated significant cohort differences in average performance at age 67.5 for all components except speed. When we compared linear slopes during the same age range (age 6278), we found no cohort differences. Trajectories of change with age in these four domains were fundamentally the same in middle-old age for individuals born during the first half of the 20th century.
引用
收藏
页码:P286 / P294
页数:9
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