Correlates of within-person (across-occasion) variability in reaction time

Timothy A. Salthouse, Diane E. Berish

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


A total of 420 adults between 18 and 91 years of age carried palm pilot (Palm M100; PalmOne, Milpitas, CA) devices and performed several reaction time trials when prompted at random times during the day. On the average, within-person variability in median reaction time from one occasion to the next was nearly the same magnitude as the between-persons variability in across-occasion mean reaction time. Analyses controlling the variation in one variable when examining relations involving the other variable suggested that an individual's mean reaction time is a more powerful predictor of relations with age and with the level of various cognitive abilities than his or her across-occasion SD.

Original languageEnglish (US)
Pages (from-to)77-87
Number of pages11
Issue number1
StatePublished - Jan 2005

All Science Journal Classification (ASJC) codes

  • Neuropsychology and Physiological Psychology


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