Skip to main content

Advertisement

Ideal-observer models of perceptual contrast enhancement

Article metrics

  • 950 Accesses

In standard ideal-observer models of sensory cue integration [1], the perceptual estimate resulting from the combination of two cues lies in the interval bounded by the estimates of each cue separately. For example, this type of model accounts well for the psychophysical result - observers give an estimate in-between the haptic-alone and the visual-alone estimates, when asked to estimate ridges height with both vision and touch [2]. Nevertheless, a class of perceptual illusion is supposedly not accounted for by this type of model, namely contrast illusion, such as the size-weight illusion [3, 4]. In the size-weight illusion, when asked to estimate the weight of two objects of the same mass but not the same size, observers estimate the larger as lighter. Using standard ideal-observer models, we showed that it is possible to account for this class of illusion provided that statistical correlation between each cue estimate is taken into account. Our argument is based on statistical inference models such as linear minimum-variance unbiased estimation, maximum a posteriori estimation, and least relative surprise estimation. This psychophysical model is general as long as the perceptual estimate deals with a physical quantity that is proportional to another physical quantity also available as a cue, such as mass and volume for a given material in the size-weight illusion.

References

  1. 1.

    Trommershäuser J, Körding KP, Landy MS: Sensory cue integration. 2011, New York: Oxford University Press

  2. 2.

    Ernst MO, Banks MS: Humans integrate visual and haptic information in a statistically optimal fashion. Nature. 2002, 415: 429-433. 10.1038/415429a.

  3. 3.

    Ernst MO: Perceptual learning: inverting the size-weight illusion. Current Biol. 2009, 19: 23-25. 10.1016/j.sbi.2008.12.004.

  4. 4.

    Brayanov JB, Smith MA: Bayesian and "anti-Bayesian" biases in sensory integration for action and perception in the size--weight illusion. J Neurophysiol. 2010, 103: 1518-1531. 10.1152/jn.00814.2009.

Download references

Acknowledgements

We thank Marc Ernst and Cesare Valerio Parise for fruitful discussions. This work was supported by the European Research Council (FP7 Programme) ERC Advanced Grant agreement no. 247 300.

Author information

Correspondence to Jonathan Platkiewicz.

Rights and permissions

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Reprints and Permissions

About this article

Cite this article

Platkiewicz, J., Michalska, H. & Hayward, V. Ideal-observer models of perceptual contrast enhancement. BMC Neurosci 14, P162 (2013) doi:10.1186/1471-2202-14-S1-P162

Download citation

Keywords

  • Physical Quantity
  • Statistical Correlation
  • Inference Model
  • Posteriori Estimation
  • Perceptual Illusion