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Does within-person variability predict errors in healthy adults aged 18-90?

Becky I Haynes1, Sarah Bauermeister1, David Bunce1

  • 1a School of Psychology, Faculty of Medicine and Health , University of Leeds , Leeds , UK.

Quarterly Journal of Experimental Psychology (2006)
|June 22, 2016
PubMed
Summary
This summary is machine-generated.

Greater psychomotor variability, especially in older adults, is linked to more errors, particularly misses, suggesting potential inattention. This highlights variability as an indicator of error proneness in cognitive tasks.

Keywords:
AgeingAttentionErrorsReaction timeWithin-person variability

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • Individual differences in cognitive performance are significant.
  • Understanding variability in basic tasks and its relation to complex errors is crucial.
  • Age-related changes may influence the relationship between variability and cognitive errors.

Purpose of the Study:

  • To investigate the link between within-person variability in psychomotor tasks and errors in higher-order cognitive tasks.
  • To determine if increased variability predicts a higher error rate.
  • To examine how age moderates the relationship between variability and errors.

Main Methods:

  • Assessed psychomotor variability using simple and choice reaction time.
  • Measured errors of omission (misses) and commission (false alarms) in visual search tasks.
  • Analyzed data from 557 participants aged 18-90 years.

Main Results:

  • Greater psychomotor variability correlated with an increased number of misses, driven by slower response times.
  • Variability was inconsistently associated with false alarms.
  • The association between variability and misses was stronger in older adults (65-90 years).

Conclusions:

  • Increased within-person variability, particularly in older adults, is associated with higher error rates (misses) in cognitive tasks.
  • This relationship may indicate underlying inattention.
  • Measures of psychomotor variability can offer insights into individual differences in error susceptibility.