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Integration of visual and vestibular cues to heading

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons83842

Butler,  JS
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83839

Bülthoff,  HH
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons84978

Smith,  S
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Butler, J., Bülthoff, H., & Smith, S. (2007). Integration of visual and vestibular cues to heading. Talk presented at 8th International Multisensory Research Forum (IMRF 2007). Sydney, Australia.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-CD37-0
Abstract
Accurate perception of one’s self motion through the environment requires the successful integration of visual, vestibular, proprioceptive and auditory cues. We have applied Maximum Likelihood Estimation analysis to visual alone, vestibular alone and visual-vestibular linear self-motion (heading) estimation tasks. Using 2IFC method of constant stimuli and fitting the resulting psychometric data with the Matlab toolbox, psychofit (Wichman and Hill, 2001), we quantified perceptual uncertainty of heading discrimination by the standard deviation of the cumulative Gaussian fit. Our data show that when the uncertainty of visual and vestibular heading discrimination are matched in the combined information condition, there are two distinct classes of observers; those whose heading uncertainty is significantly reduced in the combined condition and those observers who’s combined heading uncertainty is significantly increased. Our results are discussed in relation to monkey behavioural and neurophysiological heading e stimation data recently obtained by Angelaki and colleagues.