A Bayesian Model of Perceived Head-Centered Velocity during Smooth Pursuit Eye Movement

• DOI: 10.1016/j.cub.2010.02.059
• Publication Date: 2010-04-16T04:44:47Z
• Authors: Tom C.A. Freeman; Rebecca A. Champion; Paul A. Warren
• Keywords: Phenomenon; Smooth pursuit

During smooth pursuit eye movement, observers often misperceive velocity. Pursued stimuli appear slower (Aubert-Fleishl phenomenon [1Fleischl E.V. Physiologisch-optische Notizen, 2. Mitteilung.Sitzung Wiener Bereich der Akademie Wissenschaften. 1882; 3: 7-25Google Scholar, 2Aubert H. Die Bewegungsempfindung.Pflugers Arch. 1886; 39: 347-370Crossref Scopus (109) Google Scholar]), stationary objects to move (Filehne illusion [3Filehne W. Uber das optische Wahrnehmen von Bewegungen.Zeitschrift für Sinnephysiologie. 1922; 53: 134-145Google the perceived direction of moving is distorted (trajectory misperception [4Souman J.L. Hooge I.T.C. Wertheim A.H. Frame reference transformations in motion perception during movements.J. Comput. Neurosci. 2006; 20: 61-76Crossref PubMed (23) and self-motion veers away from its true path (e.g., slalom [5Freeman T.C.A. Banks M.S. Crowell J.A. Extraretinal retinal amplitude phase errors Filehne perception.Percept. Psychophys. 2000; 62: 900-909Crossref (29) Scholar]). Each demonstrates that speed underestimated with respect image speed, a finding has been taken as evidence early sensory signals differ accuracy 6Freeman Transducer models head-centred perception.Vision Res. 2001; 41: 2741-2755Crossref (42) 7Wertheim Motion self-motion: The direct versus inferential controversy revisited.Behav. Brain Sci. 1994; 17: 293-311Crossref (160) 8Turano K.A. Massof R.W. Nonlinear contribution velocity 385-395Crossref (53) 9Beintema van den Berg A.V. Pursuit affects precision heading for small viewing apertures.Vision 2375-2391Crossref (9) 10Perrone Krauzlis R.J. Vector subtraction using visual extraretinal signals: A new look at efference copy corollary discharge theories.J. Vis. 2008; 8: 1-14Crossref (28) 11Souman Freeman sinusoidal movements: Signal latencies non-linearities.J. (8) Scholar]. Here we present an alternative Bayesian account, based on idea perceptual estimates are increasingly influenced by prior expectations become more uncertain [12Ernst M.O. Bülthoff H.H. Merging senses into robust percept.Trends Cogn. 2004; 162-169Abstract Full Text PDF (1208) 13MacNeilage P.R. Berger D.R. model disambiguation gravitoinertial force cues.Exp. 2007; 179: 263-290Crossref (168) 14Ma W.J. Beck J.M. Latham P.E. Pouget A. inference probabilistic population codes.Nat. 9: 1432-1438Crossref (960) 15Clark J.J. Yuille A.L. Data Fusion Sensory Information Processing Systems. Kluwer Academic, Boston1990Crossref We show speeds pursued difficult discriminate than fixated stimuli. Observers therefore less certain about encoding stimuli, use quantify Aubert-Fleischl assumption centered zero [16Welchman A.E. Lam estimation accounts surprising bias 3D vision.Proc. Natl. Acad. USA. 105: 12087-12092Crossref (48) 17Stocker A.A. Simoncelli E.P. Noise characteristics human perception.Nat. 578-585Crossref (516) 18Weiss Y. Adelson E.H. illusions optimal percepts.Nat. 2002; 5: 598-604Crossref (719) 19Hürlimann F. Kiper D.C. Carandini M. Testing speed.Vision 42: 2253-2257Crossref (61) 20Ascher D. Grzywacz N.M. measurement velocity.Vision 40: 3427-3434Crossref (36) In doing so, reveal important property currently overlooked perception. Two Bayes needed relatively stage processing, one targets motion.