Abstract
Lexical bundles (LBs) are frequent groups of words that appear repeatedly in different academic texts. A plethora of research has explored their distribution and usage in general, particularly in academic texts. However, to our knowledge, the extent of research investigating LBs in the discussion sections of Medical Research Articles (MRAs) is scant. The present study examined the diversity and density of four-word LBs in the discussions of 1400 MRAs. Four-word bundles totaling 413, including general and subject-bound LBs, were extracted using the freeware concordance software program AntConc and categorized based on their syntactic structures and discourse functions. The findings revealed that discussions structurally rely heavily on phrasal LBs (i.e., prepositional phrases and noun phrases) in general and subject-bound LBs compared to clausal bundles, which include VP-based and Clause-based LBs. Regarding functional categories, the general referential bundles with their subcategories were found to have the most considerable proportion in the medical RA genre. Given the importance of LBs in disciplinary writing and academic discourse, the findings could be instrumental in crafting suitable pedagogical materials and activities on general and subject-specific LBs for academic writing in English for Medical Purposes.
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