The computational brain
The acquisition of lexical semantics for spatial terms: a connectionist model of perceptual categorization
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The acquisition of the semantics of natural language spatial terms is considered within the cognitive framework introduced by (Langacker, 1987), and the computational framework of the Berkeley Lo project (Feldman et. al., 1990). We describe a computational model which incorporates selective attention mechanisms to facilitate the identification of significant objects within the visual field, and their consequent binding to linguistic relational identifiers (for example, the trajector and landmark) according to the conventions of the input language. In contrast to previous work in this area, the approach allows extension of the system to more sophisticated (potentially cluttered and feature-laden) input scenes and referential linguistic phenomena, without a major redesign of the system. The application of the model to lexemes describing static concepts such as the English above, below and in is discussed, as are extensions to dynamic concepts.