What they highlight is…: The discourse functions of basic wh-clefts in lectures

This paper reports findings from a study on the discourse functions of basic wh-clefts such as what our brains do is complicated information processing in 160 lectures drawn from the British Academic Spoken English (BASE) corpus. Like much linguistic research on this academic genre, the investigation is motivated by the need to gain a better understanding of language use in lectures to aid effective English for Academic Purposes (EAP) course design. To this end, the composition of the wh-clauses was analysed for its main constituents (subjects, verb phrases and modality) and the clefts were grouped according to their apparent main function and subfunction within the lecture discourse. The results show that basic wh-clefts mostly serve to highlight aspects of content information and there was also disciplinary variation in their use. Implications for EAP course design are discussed.

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► Basic wh-clefts mostly highlight content information and discourse organization.
► Disciplinary variation exists in basic wh-clefts highlighting content information.
► Basic wh-clefts have an important instructive role in lectures.