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The aim is to develop and validate a method for expanding keyword dictionaries using word embeddings and graph-based techniques.

March 22, 2026Open Access

LGDE: Local Graph-based Dictionary Expansion

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The aim is to develop and validate a method for expanding keyword dictionaries using word embeddings and graph-based techniques.
Developed LGDE to explore semantic neighborhoods via graph-based techniques.
Applied local community detection on a word similarity graph from word embeddings.
Validated the method on user-generated English-language corpora and a real-world communication science case.
LGDE outperformed traditional keyword expansion methods based on direct word similarities.
The approach enriched keyword lists, improving performance in information retrieval tasks.
Expert assessments indicated greater usefulness of expanded keywords from the LGDE method.

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This approach improves information retrieval by expanding keyword lists in corpora through word embeddings.

Schindler et al. (2025) studied this question.

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