Elsevier

Vision Research

Volume 50, Issue 5, 5 March 2010, Pages 541-547
Vision Research

Orientation uncertainty reduces perceived obliquity

https://doi.org/10.1016/j.visres.2009.12.005Get rights and content
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Abstract

The influence of prejudice on perception should be greatest when certainty about stimulus identity is least. We exploited this relationship to reveal visual biases for the cardinal orientations: vertical and horizontal. Specifically, when we increased the variance of orientations in an array of grating patches, estimates of the mean became less oblique. This result is consistent with a stable prior, or prejudice, for those orientations most prevalent in natural scenes.

Keyword

Bayes

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