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Scaling Body-Related Actions in the Absence of Gravity (Passages)
Principal Investigator
Research Area:
Human factors
Species Studied
Scientific Name: Homo sapiens Species: Human

Recent experiments have shown that visual perception is modified in the absence of gravity. This experiment investigated how crewmembers perceive their visual environment in terms of the actions they can perform. This experiment provides important information on how a crewmember's workspace can be augmented with visual cues designed to avoid any errors in distance judgment that may occur during flight.

Main objectives:

  1. To demonstrate the possible decrease (disappearance) of the use of an “Eye-Height” strategy for estimating affordances after long exposure to weightlessness.
  2. To test the possibility of using a visual eye height (VEH) context to restore the Earth-adapted behavior in 0g.
  3. To test for effects of weightlessness on estimates of visual distance and perceived eye height (control measures).

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Bourrelly A, McIntyre J, and Luyat M. Perception of affordances during long-term exposure to weightlessness in the International Space Station. Cognitive Processing. 2015. September; 16(1): 171-174.

Spatial behavior

Photo Gallery
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Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Eye height, perceived
Passability, perceived
Passability, perceived

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Expedition 21 10/11/2009 12/01/2009 51 days
Expedition 22 11/30/2009 03/18/2010 109 days
Expedition 23 03/18/2010 06/01/2010 75 days
Expedition 24 06/01/2010 09/25/2010 117 days
Expedition 25 09/24/2010 11/25/2010 31 days
Expedition 26 11/26/2010 03/16/2011 111 days
Expedition 27 03/14/2011 05/23/2011 70 days
Expedition 28 05/23/2011 09/15/2011 115 days
Expedition 29 09/16/2011 11/21/2011 40 days
Expedition 30 11/14/2011 04/27/2012 166 days

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Jessica Keune
Institutional Support
European Space Agency (ESA)
Proposal Source