Entropy and type-token ratio in gigaword corpora

• URL: http://arxiv.org/abs/2411.10227v1
• Date: Fri, 15 Nov 2024 14:40:59 GMT
• Title: Entropy and type-token ratio in gigaword corpora
• Authors: Pablo Rosillo-Rodes, Maxi San Miguel, David Sanchez,
• Abstract summary: We investigate entropy and text-token ratio, two metrics for lexical diversities, in six massive linguistic datasets in English, Spanish, and Turkish. We find a functional relation between entropy and text-token ratio that holds across the corpora under consideration. Our results contribute to the theoretical understanding of text structure and offer practical implications for fields like natural language processing.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Lexical diversity measures the vocabulary variation in texts. While its utility is evident for analyses in language change and applied linguistics, it is not yet clear how to operationalize this concept in a unique way. We here investigate entropy and text-token ratio, two widely employed metrics for lexical diversities, in six massive linguistic datasets in English, Spanish, and Turkish, consisting of books, news articles, and tweets. These gigaword corpora correspond to languages with distinct morphological features and differ in registers and genres, thus constituting a diverse testbed for a quantitative approach to lexical diversity. Strikingly, we find a functional relation between entropy and text-token ratio that holds across the corpora under consideration. Further, in the limit of large vocabularies we find an analytical expression that sheds light on the origin of this relation and its connection with both Zipf and Heaps laws. Our results then contribute to the theoretical understanding of text structure and offer practical implications for fields like natural language processing.

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