Abstract
In this paper, we propose a cognitive semantic approach to represent part–whole relations. We base our proposal on the theory of conceptual spaces, focusing on prototypical structures in part–whole relations. Prototypical structures are not accounted for in traditional mereological formalisms. In our account, parts and wholes are represented in distinct conceptual spaces; parts are joined to form wholes in a structure space. The structure space allows systematic similarity judgments between wholes, taking into consideration shared parts and their configurations. A point in the structure space denotes a particular part structure; regions in the space represent different general types of part structures. We argue that the structural space can represent prototype effects: structural types are formed around typical arrangements of parts. We also show how structure space captures the variations in part structure of a given concept across different domains. In addition, we discuss how some taxonomies of part–whole relations can be understood within our framework.
Notes
The real meaning of the word “distinct” here depends on the actual way chosen to implement the conceptual spaces. Some representations tend to aggregate all possible concepts in a unique, comprehensive conceptual space including all domains. Others may represent the concepts in really distinct conceptual spaces, formed by the combination of the relevant quality domains.
An object-centered coordinate system seems to be preferable. Nonetheless, one can think of structural information based on an egocentric coordinate space, or even a retinal coordinate space (Newell et al. 2005).
More about the conceptual spaces and spatial relations can be found in Ligozat and Condotta (2005).
A main reason is that there is no general way of measuring the similarity between three graphs. There are some attempts to do so by converting tree graphs into graph spectra (e.g., Shokoufandeh et al. 2005), but the lack of isomorphism between the two kinds of representation prevents the use of graph spectra as a framework for implementing structure similarity.
Just as the botanist and the customer put different weights on different apple properties (Fig. 4), a filter can be seen as an attentional mechanism that picks out the aspects of the structural complex that are of interest to the user in a particular context.
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Acknowledgments
Sandro Fiorini is grateful for the support from CAPES Foundation, process number 1444-11-5, and ANP-Petrobras PRH-217. Mara Abel acknowledges the Brazilian Research Council (CNPq) support. Peter Gärdenfors gratefully acknowledges support from the Swedish Research Council for the Linnaeus environment Thinking in Time: Cognition, Communication and Learning. Also, we would like to thank Joel Carbonera, Ingvar Johansson, Joel Parthemore, Luan Fonseca Garcia, and anonymous reviewers for their comments.
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Rama Fiorini, S., Gärdenfors, P. & Abel, M. Representing part–whole relations in conceptual spaces. Cogn Process 15, 127–142 (2014). https://doi.org/10.1007/s10339-013-0585-x
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DOI: https://doi.org/10.1007/s10339-013-0585-x