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Related Experiment Video

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The Impact of Motor Task Conditions on Goal-Directed Arm Reaching Kinematics and Trunk Compensation in Chronic Stroke Survivors
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The Difficulty in Numerical Computation Impacts Motor Decisions in a Stop-Signal Task.

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Summary
This summary is machine-generated.

Cognitive difficulty, measured by numerical distance (ND), impacts decision-making. Easier numerical comparisons improve response speed and accuracy, enhancing both movement initiation and inhibition.

Keywords:
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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Decision Science

Background:

  • Effective decision-making relies on accurate environmental information interpretation.
  • Cognitive burden from complex interpretation can impede decision processes.
  • Numerical distance (ND) quantifies cognitive demand in numerical comparisons.

Purpose of the Study:

  • Investigate how numerical distance (ND) influences movement initiation and inhibition.
  • Examine the impact of cognitive demand on motor control and decision-making.
  • Elucidate the relationship between cognitive processing and motor responses.

Main Methods:

  • A novel numerical comparison stop-signal task (NC-SST) was developed.
  • 32 participants performed trials with varying ND for Go and Stop signals.
  • Generalized drift-diffusion and linear mixed-effects models were employed.

Main Results:

  • Larger NDs (easier comparisons) led to faster, more accurate responses and better stopping performance.
  • Drift rates increased with Go ND and were influenced by spatial numerical associations.
  • Go process parameters, especially drift rate, predicted successful stopping, interacting with Stop ND and stop-signal delay (SSD).

Conclusions:

  • Increased cognitive difficulty impairs both movement initiation and inhibition.
  • Motor decisions integrate cognitive information with perceptual features.
  • Findings extend the classical race model by incorporating cognitive-perceptual integration.