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Is dual-task performance necessarily impaired in space?

B Fowler1, O Bock, D Comfort

  • 1York University, North York, Ontario, Canada. bfowler@yorku.ca

Human Factors
|October 7, 2000
PubMed
Summary
This summary is machine-generated.

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Spaceflight stressors, not microgravity itself, impair astronaut dual-task performance. Careful task design and training can prevent performance deficits during space missions.

Area of Science:

  • Human spaceflight research
  • Neuroscience
  • Cognitive performance

Background:

  • Previous spaceflight studies reported impaired dual-task performance.
  • This impairment was hypothesized to stem from microgravity's direct effects or the spaceflight environment's multiple stressors.

Purpose of the Study:

  • To differentiate between microgravity and environmental stressors as causes of impaired dual-task performance in astronauts.
  • To investigate the impact of a fixed attention strategy on dual-task performance during spaceflight.

Main Methods:

  • Six astronauts participated in the 16-day NASA Neurolab mission.
  • A dual task involving pursuit tracking and reaction time (RT) was administered.
  • Participants were trained, used a fixed attention strategy, and were physically restrained.

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Main Results:

  • Absolute and variable tracking errors remained unimpaired.
  • Correct reaction time (RT) and its standard deviation were also unimpaired.
  • Increased variability in RT errors suggested a decrease in strategic control.

Conclusions:

  • Spaceflight-induced dual-task performance deficits are likely due to environmental stressors, not microgravity.
  • Adequate task design and astronaut training can mitigate performance decrements in spaceflight.