Short-term variability in cognitive performance and the calibration of longitudinal change

Timothy A. Salthouse, John R. Nesselroade, Diane E. Berish

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Recent studies have documented that normal adults exhibit considerable variability in cognitive performance from one occasion to another. We investigated this phenomenon in a study in which 143 adults ranging from 18 to 97 years of age performed different versions of 13 cognitive tests in three separate sessions. Substantial within-person variability was apparent across 13 different cognitive variables, and there were also large individual differences in the magnitude of within-person variability. Because people differ in the amount of short-term variability, we propose that this variability might provide a meaningful basis for calibrating change in longitudinal research. Correlations among the measures of within-person variability were very low, even after we adjusted for reliability, and there was little evidence that increased age was associated with a larger amount of within-person variability.

Original languageEnglish (US)
Pages (from-to)P144-P151
JournalJournals of Gerontology - Series B Psychological Sciences and Social Sciences
Volume61
Issue number3
DOIs
StatePublished - May 2006

All Science Journal Classification (ASJC) codes

  • Health(social science)
  • Sociology and Political Science
  • Life-span and Life-course Studies

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