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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4616
DTSTART:20171003T170500Z
DTEND:20171003T180000Z
DTSTAMP:20240329T125515Z
LAST-MODIFIED:20170830T165001Z
LOCATION:4274 Chamberlin (refreshments will be served)
SUMMARY:Systematic misperceptions of 3D motion explained by Bayesian i
nference\, Chaos & Complex Systems Seminar\, Bas Rokers\, UW Departmen
t of Psychology
DESCRIPTION:Over the years\, a number of surprising\, but seemingly un
related errors in 3D motion perception have been reported. Given the r
elevance of accurate motion perception to our everyday life\, it is im
portant to understand the cause of these perceptual errors.
\n
\nWe considered that these perceptual errors might arise as a natura
l consequence of estimating motion direction given sensory noise and t
he geometry of 3D viewing. We characterized the retinal motion signals
produced by objects moving along arbitrary trajectories through three
dimensions and developed a Bayesian model of perceptual inference. Th
e model predicted a number of known errors\, including a lateral bias
in the perception of motion trajectories\, and a dependency of this bi
as on stimulus contrast and viewing distance. The model also predicted
a number of previously unknown errors\, including a dependency of per
ceptual bias on eccentricity\, and a surprising tendency to misreport
approaching motion as receding and vice versa.
\n
\nWe then us
ed standard 3D displays as well as a virtual reality (VR) headsets to
test these predictions in naturalistic settings\, and established that
people make the predicted errors.
\n
\nIn sum\, we developed
a quantitative model of 3D motion perception and provided a parsimonio
us account for a range of systematic perceptual errors in naturalistic
environments.
URL:https://www.physics.wisc.edu/events/?id=4616
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