Westermann, G (1998) Emergent modularity and U-shaped learning in a constructivist neural network learning the English past tense. In: Proceedings of the Twentieth Annual Conference of the Cognitive Science Society. LAWRENCE ERLBAUM ASSOC PUBL, Mahwah, N.J., pp. 1130-1135. ISBN 0-8058-3231-9Full text not available from this repository.
A constructivist neural network model is presented that learns the past tense of English verbs. The model builds its architecture in response to the learning task in a way consistent with neurobiological and psychological evidence. The model outperforms existing connectionist and symbolic past tense models in terms of learning and generalization behavior, and it displays a U-shaped learning curve for many irregular verbs. The trained model develops a modular architecture with dissociations between regular and irregular verbs, and lesioning the different pathways leads to results comparable with neurological disorders. It is argued that the success of the model is due to its constructivist nature, and that the distinction between fixed-architecture and constructivist models is fundamental. Given this distinction, constructivist systems provide more realistic models of cognitive development.
|Item Type:||Contribution in Book/Report/Proceedings|
|Uncontrolled Keywords:||COGNITIVE-DEVELOPMENT ; MODEL ; LANGUAGE ; SYSTEM|
|Subjects:||B Philosophy. Psychology. Religion > BF Psychology|
|Departments:||Faculty of Science and Technology > Psychology|
|Deposited On:||27 Mar 2012 11:28|
|Last Modified:||10 Apr 2014 00:55|
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