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Related Experiment Videos

Hand deviations toward distractors. Evidence for response competition.

T N Welsh1, D Elliott, D J Weeks

  • 1Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada. welshtn@mcmail.cis.mcmaster.ca

Experimental Brain Research
|August 12, 1999
PubMed
Summary

Movement paths unexpectedly veer towards distractors, not away, in cluttered environments. This suggests distractors can activate competing responses, influencing aiming movements when not physical barriers.

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Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Human Movement Science

Background:

  • Motor planning in cluttered environments often involves inhibiting responses to distractors.
  • Existing theories propose movement paths deviate away from distractors due to this inhibition.

Purpose of the Study:

  • To investigate the trajectory deviations of aiming movements in the presence of distractors.
  • To challenge the object avoidance hypothesis regarding distractor influence on movement paths.

Main Methods:

  • Participants performed aiming movements towards a target in environments with distractors.
  • Movement trajectories were analyzed for deviations relative to the target and distractor locations.

Main Results:

Related Experiment Videos

  • Movement paths consistently veered towards the distractor, contradicting the object avoidance hypothesis.
  • Distractor effects on trajectory were independent of the direction of limb movement.

    • Conclusions:

    • Distractors, when not physical barriers, can elicit competing responses that influence movement trajectories.
    • Temporal advantages in processing distractors may lead to attraction of the movement path towards the distractor.