Age-related increases of interindividual differences in cognitive/brain function and related factors: Considerations for research methods

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  • Sekiyama Kaoru
    Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto University
  • Suzuki Maki
    United Graduate School of Child Development, Osaka University

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  • 加齢による認知脳機能の個人差拡大とその背景要因―研究方法への省察―
  • カレイ ニ ヨル ニンチ ノウ キノウ ノ コジンサ カクダイ ト ソノ ハイケイ ヨウイン : ケンキュウ ホウホウ エ ノ セイサツ

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Abstract

<p>As the ratio of elderly people increases worldwide, it is becoming more important to understand cognitive aging. Older adults show much greater interindividual differences than young adults. These differences grow with age, making it impossible for some older adults to participate as research volunteers in aging studies. Relatedly, results of cognitive aging studies are affected by sampling and by selection of cross-sectional/longitudinal research methods. These issues are discussed in the context of several behavioral and neuroimaging studies. Factors affecting increased interindividual differences are also reviewed. Researchers should pay attention to these factors and to characteristics of research methods when planning and interpreting the results of studies on cognitive aging.</p>

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