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. Author manuscript; available in PMC: 2013 Sep 19.
Published in final edited form as: Psychol Rev. 2012 Jul;119(3):678–683. doi: 10.1037/a0028733

Figure 1.

Figure 1

In the Feldman and Singh (2005) approach, a contour is assumed to continue with a turning angle that is distributed as a von Mises (approximately normal) distribution with a mean of 0° (i.e., straight). The information at a point depends on the surprisal of the turning angle, −log p(α).