Structure and predictive power of intraindividual variability in health and activity measures

Paolo Ghisletta, John R. Nesselroade, David L. Featherman, John W. Rowe

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

Intraindividual variability has been shown in many studies to be well structured over time and capable of predicting a wide range of behaviors. This study provides analyses of weekly variations of health and activity measurements in a sample (N = 52) of elderly persons (mean age = 77.5, SD = 7.2). The three main goals and results entailed: 1. Assessing the reliable nature of a health and an activity factor through a metric invariant confirmatory factor model; 2. Assessing the independence of intraindividual variability from level information and showing that the amount of intra-person variability during the first and second half of data collection correlate very highly; 3. Showing that intraindividual variability information of health and activity scores is superior to level information in predicting mortality.

Original languageEnglish
Pages (from-to)73-83
Number of pages11
JournalSwiss Journal of Psychology
Volume61
Issue number2
DOIs
StatePublished - Jun 2002
Externally publishedYes

Keywords

  • Activity
  • Intraindividual variability
  • Mortality
  • Self-assessed health

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