Orientation uncertainty reduces perceived obliquity

The influence of prejudice oil 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 all 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 (C) 2009 Elsevier Ltd All rights reserved