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Related Experiment Videos

Lateralized dual task interference in left-handers: initial value differences do not affect the outcome

D M McBride1, B J Cherry, D W Kee

  • 1Department of Psychology, California State University, Fullerton 92634, USA.

Neuropsychologia
|July 1, 1995
PubMed
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Left-handers show greater finger-tapping interference in their left hand during dual-task performance, even when baseline advantages are removed. This suggests lateralized interference is not solely due to initial tapping differences.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Motor Control

Background:

  • Dual-task interference is a common phenomenon in cognitive psychology.
  • Previous research suggested that baseline tapping differences might explain lateralized interference.
  • Understanding these effects is crucial for cognitive and neurological studies.

Purpose of the Study:

  • To investigate the factors contributing to dual-task finger-tapping interference.
  • To determine if lateralized interference effects are solely dependent on baseline tapping advantages.
  • To clarify the mechanisms behind cognitive interference in motor tasks.

Main Methods:

  • Assessed left-handers based on handwriting preference and left-hand baseline tapping advantage.
  • Participants performed finger-tapping tasks alone and concurrently with anagram solving.

Related Experiment Videos

  • Experimentally adjusted trials to remove baseline tapping advantages.

    • Main Results:

    • Left-handers exhibited greater interference in left-hand tapping during dual-task performance.
    • This interference persisted even when baseline tapping advantages were experimentally removed.
    • Results contradict the hypothesis that lateralized interference is solely due to initial tapping differences.

    Conclusions:

    • Lateralized interference effects in dual-task finger-tapping are not solely explained by baseline tapping differences.
    • Cognitive load during concurrent tasks significantly impacts motor performance lateralization.
    • Findings challenge existing models and suggest more complex neural mechanisms are involved.