![]() ![]() ![]() In this system, patients' symptoms are evaluated in terms of their correlation with a standard or prototypical representation of specific disorders. The prototype model has been suggested as a viable alternative to the current Neo-Kraepelinian approach (Cantor, Smith, French, & Mezzich, 1980 Clarkin, Widiger, Frances, Hurt, & Gilmore, 1983 Horowitz, Post, French, Wallis, & Siegelman, 1981 Livesley, 1985a, 1985b). Feuer, in Comprehensive Clinical Psychology, 1998 3.08.5.2.2 Prototype model This method is formally identical to assessing the similarity of an item to the prototype using an exponentially decaying squared-distance function, as described above. The similarity-based prototype models can be mathematically formalized by specifying a Gaussian distribution over feature values for each category, with the mean and variance of each distribution depending on the category. To model the prototype view with the Bayesian network model of Figure 6.1, the C variable would take on states representing different possible categories, and the feature values would depend probabilistically on which category the item is a member of ( Figure 6.2). ![]() Some prototype models, for example, assume that the similarity of an item to the prototype of a category is an exponentially decaying function of the psychological distance (or squared distance) between them ( Nosofsky, 1987, 1992). Categorization is then a function of how similar the category’s prototype is to the object to be categorized. Prototype models assume that for each category people retain in memory a single specific example (the prototype), and that category members in the world fall in a distribution around the prototype ( Fried & Holyoak, 1984 Reed, 1972). Krynski, in Psychology of Learning and Motivation, 2013 2.1.1 Prototype Models ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |