Go to the NASA Homepage
Search >
Click to Search
Human Systems Integration Division homepageHuman Systems Integration Division homepage Organization pageOrganization page Technical Areas pageTechnical Areas page Outreach and Publications pageOutreach and Publications page Contact pageContact page
Human Systems Integration Division Homepage
Outreach & Publications Sidebar Header
Go to the Outreach & Publications pageGo to the Outreach & Publications page
Go to Awards pageGo to Awards page
Go to News pageGo to News page
Go to Factsheets pageGo to Factsheets page
Go to Multimedia pageGo to Multimedia page
Go to Human Factors 101 pageGo to Human Factors 101 page
What is Human System Integration? Website
Publication Header
Humans can perceive heading without visual  (2006)
Abstract Header
It has previously been reported that humans can determine their direction of 3D translation (heading) from the 2D velocity ?eld of retinal motion experienced during self-motion through a rigid environment, as is done by current computational models of visual heading estimation from optic ?ow. However, these claims were supported by studies that used stimuli that contained low rotational ?ow rates and/or additional visual cues beyond the velocity ?eld or a task in which observers were asked to indicate their future trajectory of self-motion (path). Thus, previous conclusions about heading estimation have been confounded by the presence of other visual factors beyond the velocity ?eld, by the use of a path-estimation task, or both. In particular, path estimation involves an exocentric computation with respect to an environmental reference, whereas heading estimation is an egocentric computation with respect to one's line of sight. Here, we use a heading-adjustment task to demonstrate that humans can precisely estimate their heading from the velocity ?eld, independent of visual information about path, displacement, layout, or acceleration, with accuracy robust to rotation rates at least as high as 20 deg/s. Our ?ndings show that instantaneous velocity-?eld information about heading is directly available for the visual control of locomotion and steering.
Private Investigators Header
Authors Header
Groups Header
Keywords Header
curvilinear, eye, integration, motion, movements, navigation, temporal
References Header
Journal of Vision (2006) 6, 874-881.
Download Header
Adobe PDF Icon  Li_2006_jov_6_9_2.pdf (Download Acrobat Reader Click to download Adobe Acrabat Reader)
  (867KB) (application/pdf)
Go to the First Gov Homepage
Go to the NASA - National Aeronautics and Space Administration Homepage
Curator: Phil So
NASA Official: Jessica Nowinski
Last Updated: August 15, 2019