What makes a category seem natural or intuitive? In this paper, an unsupervised categorization task was employed to examine observer agreement concerning the categorization of nine different stimulus sets. The stimulus sets were designed to capture different intuitions about classification structure. The main empirical index of category…

Presents a conceptual framework for comparing instructional design models and employing appropriate design applications. Highlights include the classification system on which the framework is centered and how the framework allows for the models' instructional context and the size of the audience. (27 references) (KRN)