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Time Perception in Microgravity (Time_Perception)
Principal Investigator
Research Area:
Behavior and performance
Species Studied
Scientific Name: Homo sapiens Species: Human

Many spatial-temporal tasks require an explicit representation of both space and time. Ground-based research shows distance perception and time perception to be intimately linked. As a complement to previous studies on crew perception, this experiment will quantify subjective changes in time perception during and after long-duration exposure to microgravity.

The objectives of this study are to use crew judgements on specific time intervals pre-, in-, and postflight to determine:

  • If time duration is underestimated by astronauts in orbit
  • If an underestimation of time carries over to the early postflight period
  • If time re-adaptation to 1G is a gradual process

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  • Duration production and reproduction
  • Single tasks and dual tasks
  • Preflight and inflight measurements
  • Inflight measurements and various durations of microgravity exposure
  • Early and late postflight measurements

    Results for this investigation are unavailable. This is an international experiment. NASA does not currently have an agreement with international space partners to archive their data in the LSDA.

  • Parameters
    Reaction times
    Time duration (estimated)

    Mission/Study Information
    Mission Launch/Start Date Landing/End Date Duration
    Expedition 56 06/03/2018 10/04/2018 123 days
    Expedition 57 10/04/2018 12/20/2018 77 days
    Expedition 58 12/18/2018 03/14/2019 85 days
    Expedition 59 03/14/2019 06/24/2019 102 days
    Expedition 60 06/24/2019 10/03/2019 101 days
    Expedition 61 10/03/2019 02/06/2020 126 days
    Expedition 62 02/06/2020 04/17/2020 70 days
    Expedition 63 04/17/2020 10/21/2020 187 days
    Expedition 64 10/21/2020 In progress

    Additional Information
    Managing NASA Center
    Johnson Space Center (JSC)
    Responsible NASA Representative
    Johnson Space Center LSDA Office
    Project Manager: Pamela A. Bieri
    Institutional Support
    European Space Agency (ESA)
    Alternate Experiment Name
    Proposal Date
    Proposal Source