A new approach to (key) keywords analysis: using frequency, and now also dispersion

• Stefan Th. Gries ^[1]
  1. [1] University of California, Santa Barbara & Justus Liebig University
• Localización: Research in Corpus Linguistics (RiCL), ISSN-e 2243-4712, Vol. 9, Nº. Extra 2, 2021 (Ejemplar dedicado a: "Corpus-linguistic perspectives on textual variation"), págs. 1-33
• Idioma: inglés
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• Resumen

  • A widely-used method in corpus-linguistic approaches to discourse analysis, register/text type/genre analysis, and educational/curriculum questions is that of keywords analysis, a simple statistical method aiming to identify words that are key to, i.e. characteristic for, certain discourses, text types, or topic domains. The vast majority of keywords analyses relied on the same statistical measure that most collocation studies are using, the log-likelihood ratio, which is performed on frequencies of occurrence in two corpora under consideration. In a recent paper, Egbert and Biber (2019) advocated a different approach, one that involves computing log-likelihood ratios for word types based on the range of their distribution rather than their frequencies in the target and reference corpora under consideration. In this paper, I argue that their approach is a most welcome addition to keywords analysis but can still be profitably extended by utilizing both frequency and dispersion for keyness computations. I am presenting a new two-dimensional approach to keyness and exemplifying it on the basis of the Clinton-Trump Corpus and the British National Corpus.