THE DEVELOPMENT OF FEATURE SPACES FOR SIMILARITY AND CATEGORIZATION

Similarity and categorization are usually formulated as operations ove r a set of available features at time t of conceptual development. In this paper, we discuss possible constraints on the development of the feature space such as the history of categorization, perceptual biases in the selection and the construction of features, and the role of hi gher-level knowledge and beliefs. The history of categorization is def ined as the feature vocabulary and the set of concepts people have acq uired as a result of representing and categorizing objects. Perceptual and developmental biases refer to the salience of specific aspects of the stimuli which influence the selection and the construction of fea tures at different stages of development. The constraining role of gen eral knowledge on the selection and the creation of features is also d iscussed. It is argued that theories may need the constraints they are supposed to provide. We conclude by discussing issues related to the interactions of perceptions and conceptions in developing feature spac es for higher-level cognition.