We tested the hypothesis that long-term adaptation to the normal contingencies between walking and its multisensory consequences (including optic flow) leads to enhanced discrimination of appropriate visual speeds during self-motion. In experiments 1 (task 1) and 2 a two-interval forced-choice procedure was used to compare the perceived speed of a simulated visual flow field viewed while walking with the perceived speed of a flow field viewed while standing. Both experiments demonstrated subtractive reductions in apparent speed. In experiments 1 and 3 discrimination thresholds were measured for optic flow speed while walking and while standing. Consistent with the optimal-coding hypothesis, speed discrimination for visual speeds near walking speed was enhanced during walking. Reduced sensitivity was found for slower visual speeds. The multisensory context of walking alters the coding of optic flow in a way that enhances speed discrimination in the expected range of flow speeds.
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References
1.
BarlowH B, 1990“A theory about the functional role and synaptic mechanism of visual after-effects”, in Vision: Coding and Efficiency Ed. BlakemoreC (Cambridge: Cambridge University Press) pp 363–375
2.
BarlowH BFöldiakP, 1989“Adaptation and decorrelation in the cortex”, in The Computing Neuron Eds DurbinR MMiallCMitchisonG J (Wokingham, Berks: Addison Wesley) pp 54–72
CarlsonV R, 1962“Adaptation in the perception of visual velocity”Journal of Experimental Psychology64192–197
5.
CliffordC W GWenderothP, 1999“Adaptation to temporal modulation can enhance differential speed sensitivity”Vision Research394324–4332
6.
DichgansJBrandtT, 1978“Visual – vestibular interaction: Effects on self-motion perception and postural control”, in Handbook of Sensory Physiology volume 8: Perception Eds HeldRLeibowitzH WTeuberH-L (Berlin: Springer) pp 755–804
7.
DodwellP CHumphreyG K, 1990“A functional theory of the McCollough effect”Physiological Review9778–89
8.
DurginF H, 1996“Visual aftereffect of texture density contingent on color of frame”Perception & Psychophysics58207–233
9.
DurginF HFoxL FKimD H, 2003“Not letting the left leg know what the right leg is doing: Limb-specific locomotor adaptation to sensory-cue conflict”Psychological Science16567–572
10.
DurginF HFoxL FSchafferEWhitakerR, 2005a“The perception of linear self-motion”, in Human Vision and Electronic Imaging X Proceedings of SPIE-IS&T Electronic Imaging SPIE volume 5666 Eds RogowitzB EPappasT NDalyS J, pp 503–514
11.
DurginF HGigoneKScottR, 2005b“Perception of visual speed while moving”Journal of Experimental Psychology: Human Perception and Performance31339–353
12.
DurginF HPelahA, 1999“Visuomotor adaptation without vision?”Experimental Brain Research12712–18
13.
DurginF HPelahAFoxL FLewisJ YKaneRWalleyK A, 2005c“Self-motion perception during locomotor recalibration: More than meets the eye”Journal of Experimental Psychology: Human Perception and Performance31398–419
14.
DurginF HProffittD R, 1996“Visual learning in the perception of texture: Simple and contingent effects of texture density”Spatial Vision9423–474
15.
DurginF HReedCTigueC, 2007“Step frequency and the perceived speed of self-motion”Transactions in Applied Perception4(1) 1–23
16.
GreenleeM WHeitgerF, 1988“The functional role of contrast adaptation”Vision Research28791–797
17.
HarrisL RMorganM JStillA W, 1981“Moving and the motion after-effect”Nature293139–141
18.
LishmanJ RLeeD N, 1973“The autonomy of visual kinaesthesis”Perception2287–294
19.
LoomisJ MDa SilvaJ AFujitaNFukusimaS S, 1992“Visual space perception and visually directed action”Journal of Experimental Psychology: Human Perception and Performance18906–921
20.
MacKayD MMacKayV, 1975“What causes decay of pattern-contingent chromatic aftereffects?”Vision Research15462–464
21.
MatherGHarrisJ, 1998“Theoretical models of the motion aftereffect”, in The Motion Aftereffect: A Modern Perspective Eds MatherGVerstratenFAnstisS (Cambridge, MA: MIT Press) pp 157–185
22.
MittelstaedtM-LMittelstaedtH, 2001“Idiothetic navigation in humans: Estimations of path length”Experimental Brain Research139318–332
23.
PavardBBerthozA, 1977“Linear acceleration modifies the perceived velocity of a moving visual scene”Perception6529–540
24.
PelahABarlowH B, 1996“Visual illusion from running”Nature381283
25.
PelahABoddyA, 1998“Adaptive modulation of the motion after-effect by walking”Journal of Physiology (London)506P111P–112P (abstract)
26.
ProbstTKrafczykSBrandtTWistE R, 1984“Interaction between perceived self-motion and object-motion impairs vehicle guidance”Science225536–538
27.
RieserJ JAshmeadD HTalorC RYoungquistG A, 1990“Visual perception and the guidance of locomotion without vision to previously seen targets”Perception19675–689
28.
RieserJ JPickH LJrAshmeadDGaringA, 1995“Calibration of human locomotion and models of perceptual – motor organization”Journal of Experimental Psychology: Human Perception and Performance21480–497
29.
SunH JCamposJ LChanG S, 2004a“Multisensory integration in the estimation of relative path length”Experimental Brain Research154246–254
30.
SunH JCamposJ LYoungMChanG SEllardC G, 2004b“The contributions of static visual cues, nonvisual cues and optic flow in distance estimation”Perception3349–65
31.
ThompsonP GMovshonJ A, 1978“Storage of spatially specific threshold elevation”Perception765–73
32.
ThurrellA E IPelahADistlerH K, 1998“The influence of non-visual signals of walking on the perceived speed of optic flow”Perception27147–148 (abstract)
33.
WadeNVerstratenF, 1998“Introduction and historical overview”, in The Motion Aftereffect: A Modern Perspective Eds MatherGVerstratenFAnstisS (Cambridge, MA: MIT Press) pp 1–24
34.
WallachH, 1987“Perceiving a stable environment when one moves”Annual Review of Psychology381–27
35.
WallachHFlahertyE W, 1975“A compensation for field expansion caused by moving forward”Perception & Psychophysics17445–449
36.
WertheimA H, 1994“Motion perception during self-motion: The direct versus inferential controversy revisited”Behavioral and Brain Sciences17293–355
37.
WohlgemuthA, 1911“On the after-effect of seen movement”British Journal of Psychology Monograph Supplement11–117
