![]() ![]() Similarity is usually measured with multidimensional scaling methods (see also Multidimensional Scaling in Psychology Signal Detection Theory: Multidimensional). The idea is that classification depends on the similarity between exemplar i and the category J prototype relative to i's similarity to the prototypes of all other categories. Where b J ( 0 ≤ b J ≤ 1, Σ b J = 1) represents the bias towards making category response J and s iPJ is the similarity between exemplar i and the prototype of category J. (1) P ( R J / S i ) = b J s iPJ ∑ K b K s i P K
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