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Time pressure and attention allocation effect on upper limb motion steadiness.

Sicong Liu1, Robert C Eklund, Gershon Tenenbaum

  • 1a Department of Educational Psychology and Learning Systems , Florida State University , Tallahassee.

Journal of Motor Behavior
|November 27, 2014
PubMed
Summary

Ironic process theory (IPT) was tested by examining attentional effects on upper limb steadiness. Findings suggest IPT predictions may be inaccurate for motor performance under mental load, especially for women.

Keywords:
choking under pressuregender differenceironic processskin conductance

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Area of Science:

  • Psychology
  • Motor Control
  • Cognitive Science

Background:

  • Ironic process theory (IPT) explains how attempting to suppress a thought can paradoxically increase its occurrence.
  • Understanding attentional allocation's impact on motor performance under varying cognitive demands is crucial.
  • The utility of physiological measures like skin conductance in reflecting subjective experiences needs further validation.

Purpose of the Study:

  • To investigate how attentional allocation influences upper limb motion steadiness under different mental load conditions, guided by IPT.
  • To assess the validity of skin conductance level as a measure of pressure perception.
  • To explore gender differences in response to mental load and attentional manipulation.

Main Methods:

  • A mixed experimental design with within-participant (phase) and between-participant factors (gender, mental load, attention, order).
  • Eighty college students (40 male, 40 female) participated in a 2 × 2 × 2 × 2 × 2 factorial study.
  • Measurements included upper limb motion steadiness and skin conductance level.

Main Results:

  • Findings partially supported IPT, but its predictions for motor performance under mental load were not fully accurate.
  • Women's upper limb steadiness was unaffected by mental load or attention manipulation, unlike men's.
  • The validity of skin conductance level for measuring pressure perception was questioned.

Conclusions:

  • IPT's predictions regarding motor performance under mental load require refinement, particularly concerning gender differences.
  • Attentional allocation and mental load may differentially affect motor control in men and women.
  • Skin conductance level may not be a reliable indicator of pressure perception.