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Abstract
With increasing opportunities to learn online, the problem of positioning learners in an educational network of content offers new possibilities for the utilisation of geometry-based natural language processing techniques.
In this article, the adoption of latent semantic analysis (LSA) for guiding learners in their conceptual development is investigated. We propose five new algorithmic derivations of LSA and test their validity for positioning in an experiment in order to draw back conclusions on the suitability of machine learning from previously accredited evidence. Special attention is thereby directed towards the role of distractors and the calculation of thresholds when using similarities as a proxy for assessing conceptual closeness.
Results indicate that learning improves positioning. Distractors are of low value and seem to be replaceable by generic noise to improve threshold calculation. Furthermore, new ways to flexibly calculate thresholds could be identified.
In this article, the adoption of latent semantic analysis (LSA) for guiding learners in their conceptual development is investigated. We propose five new algorithmic derivations of LSA and test their validity for positioning in an experiment in order to draw back conclusions on the suitability of machine learning from previously accredited evidence. Special attention is thereby directed towards the role of distractors and the calculation of thresholds when using similarities as a proxy for assessing conceptual closeness.
Results indicate that learning improves positioning. Distractors are of low value and seem to be replaceable by generic noise to improve threshold calculation. Furthermore, new ways to flexibly calculate thresholds could be identified.
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Proceedings of the EACL Workshop on GEMS: Geometrical Models of Natural Language Semantics |
| Herausgeber*innen | R. Basili and M. Pennacchiotti |
| Erscheinungsort | Athens |
| Verlag | Association for Computational Linguistics (ACL) |
| Seiten | 41 - 48 |
| Publikationsstatus | Veröffentlicht - 1 Sept. 2009 |
Österreichische Systematik der Wissenschaftszweige (ÖFOS)
- 102
- 101029 Mathematische Statistik
- 102009 Computersimulation
- 602011 Computerlinguistik
Projekte
- 1 Abgeschlossen
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Language Technologies for Lifelong Learning
Hornik, K. (Projektleitung), Neumann, G. (Projektleitung), Hoisl, B. (Forscher*in), Koblischke, R. (Forscher*in) & Wild, F. (Forscher*in)
1/03/08 → 28/02/11
Projekt: Forschungsförderung