A cross-disciplinary investigation of multi-word expressions in the moves of research article abstracts

Conformity to the epistemological orientations of academic disciplines is often reflected in the ways in which knowledge is constructed and communicated through certain linguistic features in academic genres. This paper explores instances of such conformity in hard and soft science disciplines, as it is reflected in the use of recurrent word combinations in different rhetorical moves of research article abstracts. A corpus-driven approach was adopted to identify the most frequently occurring word combinations of different length in a corpus of 5910 abstracts from six disciplines. Following this, the identified sequences were classified according to their communicative functions in different moves of the abstract. A mixed-methods approach was then adopted through which the patterns of variation reflected in the use of the identified sequences were examined both quantitatively and qualitatively. It was found that members of different academic domains have different priorities for representing their research in academic abstracts.