The article examines the disciplinary preferences of medical and psychology writers of research articles (RAs) in the use of epistemic lexical verbs (ELVs), regarding their frequency, prominence, distribution across the RA sections, and recurrent phraseology. The results show that disciplinary affiliation affects these phenomena, as more ELVs are found in psychology than in medicine. Both groups prefer speculative judgements and quotative evidence and most frequently use ELVs in Discussions. Yet, psychology authors are more balanced in their preferences and rely on a wider selection of frequent ELVs which are often combined with self-mention. Medical authors are more inclined towards deductive ELVs. Disciplinary differences are also observed in the choice of the specific ELVs, their frequency distributions and phraseology in the distinct RA sections.

The article studies the use of linking adverbials (LAs) in English-medium articles by Polish and Anglophone scholars representing medicine and psychology, attempting to reveal discipline- and culture-specific preferences in the choice, frequency and distribution of linkers. The results show that disciplinary and linguacultural constraints impact on LA use. Variation across disciplines reflects differences in the knowledge base and its rhetorical management, as there are significantly more LAs in psychology than in medicine. Cross-cultural variation determines the choice of specific LA (sub)categories in line with the authors’ linguacultural backgrounds, target readers and publication contexts. These findings can raise academic writers’ awareness of culture- and discipline-driven aspects of adverbial cohesion in English academic prose.