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. Author manuscript; available in PMC: 2012 Mar 1.
Published in final edited form as: Cogn Syst Res. 2011 Mar 1;12(1):1–18. doi: 10.1016/j.cogsys.2010.07.004

Figure 5.

Figure 5

An illustration of the local interactions among adjacent categories according to the packing theory. Each ellipsis indicates equal-likelihood contour of category. The star shows a central tendency of a focal category, and triangles show the few experienced instances of this focal category. The covariance matrix of the focal category is estimated with deviation of instances (triangles; Sik), harmonic mean covariance matrix (ellipses) of adjacent categories (σ̂ij), and deviation of central tendencies (filled circles) of adjacent categories (Ŝij).