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Related Experiment Videos

Performance on paced serial addition tasks indicates an associative network for calculation.

M Hiscock1, J S Caroselli, L E Kimball

  • 1Department of Psychology, University of Houston, Houston, TX 77204-5341, USA. MHISCOCK@UH.EDU

Journal of Clinical and Experimental Neuropsychology
|June 19, 2001
PubMed
Summary

Paced serial addition (PSA) performance is significantly affected by arithmetic variables, not just general processing capacity. Specific numeral formats and response interference impact calculation accuracy in adults.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • Paced serial addition (PSA) tasks are traditionally viewed as measures of general information-processing capacity.
  • Emerging research indicates that arithmetic-specific factors also influence performance on PSA tasks.

Purpose of the Study:

  • To investigate the impact of arithmetic-specific variables on paced serial addition (PSA) performance in healthy adults.
  • To test predictions derived from the cognitive psychology of calculation using visual PSA experiments.

Main Methods:

  • Two visual paced serial addition (PSA) experiments were conducted with normal adult participants.
  • Experiment 1 involved mixing Arabic and Roman numeral formats and varying addend order.
  • Experiment 2 manipulated trial-to-trial variability of sums using only Arabic numerals.

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Main Results:

  • Mixing familiar (Arabic) and less familiar (Roman) numeral formats decreased PSA scores.
  • The Roman-Arabic addend order proved more challenging than the Arabic-Roman order.
  • Constraining sum variability in Experiment 2 impaired performance, highlighting interference effects.

Conclusions:

  • PSA performance is demonstrably influenced by arithmetic-specific variables, supporting associative network models of calculation.
  • Interference from extraneous addends and responses appears to be a key factor limiting performance in PSA tasks.