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Sequential and coordinative complexity in time-accuracy functions for mental arithmetic

P Verhaeghen1, R Kliegl, U Mayr

  • 1Department of Psychology, University of Leuven, Belgium. pverhaeg@psych.syr.edu

Psychology and Aging
|January 7, 1998
PubMed
Summary
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Older adults show age-related differences in mental arithmetic, particularly with complex tasks. Coordinative demands, not just processing speed, impact older adults

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Aging Research

Background:

  • Investigating cognitive aging requires understanding how task complexity affects performance across different age groups.
  • Mental arithmetic, involving both sequential and coordinative processing, serves as a valuable paradigm for cognitive aging studies.

Purpose of the Study:

  • To examine age-related differences in time-accuracy functions during single-digit mental addition and subtraction.
  • To differentiate the impact of sequential versus coordinative complexity on cognitive performance in younger and older adults.

Main Methods:

  • Recruited 18 younger adults (mean age 21.7) and 16 older adults (mean age 68.8).
  • Manipulated sequential complexity by varying the number of operations (5 vs. 10).

Related Experiment Videos

  • Induced coordinative complexity using bracketing tasks.

    • Main Results:

    • Significant age differences emerged in coordinative conditions, but not in sequential conditions.
    • Older adults exhibited larger onset times and lower asymptotic performance under high coordinative demands.
    • The rate of approach to the asymptote did not differ between age groups.

    Conclusions:

    • Age-related declines in cognitive performance are exacerbated by coordinative complexity, beyond basic processing speed.
    • Coordinative demands disproportionately impair computation speed and self-monitoring in older adults.
    • Semantic memory access appears unaffected by coordinative demands in older adults.