Knowledge-based classification of ill-defined categories
نویسندگان
چکیده
منابع مشابه
Classification in well-defined and ill-defined categories: evidence for common processing strategies.
Early work in perceptual and conceptual categorization assumed that categories had criterial features and that category membership could be determined by logical rules for the combination of features. More recent theories have assumed that categories have an ill-defined structure and have prosposed probabilistic or global similarity models for the verification of category membership. In the exp...
متن کاملA Cognitive Modeling Approach to Learning of Ill-defined Categories
A vast majority of concepts learned by human beings arc ill-defined. Such concepts elude precise definitions and are represented by nonverbalizable descriptions. Literature from cognitive psychology provides an insight into processes used by human beings for learning ill-defined categories. This paper describes the implementation of an Adaptive Concept Learning (ACL) system designed learn ill-d...
متن کاملOmniCat: Automatic Text Classification with Dynamically Defined Categories
We present OmniCat, an ontology-based text categorization method that classifies documents into a dynamically defined set of categories specified as contexts in the domain ontology. The method does not require a training set and is based on measuring the semantic similarity of the thematic graph created from a text document and the ontology fragments created by the projection of the defined con...
متن کاملHamming-like distances for ill-defined strings in linguistic classification
Ill-defined strings often occur in soft sciences, e.g. in linguistics or in biology. In this paper we consider `-length strings which have in each position one of the three symbols 0 or false, 1 or true, [ or irrelevant. We tackle some generalisations of the usual Hamming distance between binary crisp strings which were recently used in computational linguistics. We comment on their metric prop...
متن کاملInferences About Contextually Defined Categories
The categories referred to in textual descriptions are often defined by their context {Roth & Shoben, 1983). The results of experiments in this article suggest that inferences about the most typical exemplars of such categories are encoded to a high degree during reading. Subjects were presented with sentences that included contextual definitions of categories but did not mention any exemplars ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Memory & Cognition
سال: 1985
ISSN: 0090-502X,1532-5946
DOI: 10.3758/bf03198450