We analyse frequency, dispersion and usage of lexical categories (nouns,
adjectives, verbs, eponyms and adverbs ending in –mente) in 363 medicine
popularisation texts in Spanish (334690 words). We propose the concept of
linear dispersion, which is suitable for analysing homogeneous corpora without
different subsections. Results indicate that the most commonly used words do
not have medical meanings, excepting nouns. In addition, words in the lowest
ranks are heavily dependent on the contents of each text. Nouns and adjectives
show the highest lexical richness (more different lemmas), which is related to the
informative nature of the corpus. The article includes an appendix with the most
used lemmas that may be useful for professionals working in this domain.
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