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This study investigates the uses and functions of laughter and humour in a corpus of nine PhD defences/vivas. The data include the PhD defences in their entirety, including monologic and dialogic talk by participants from a variety of research cultures. The defences were video-recorded and transcribed, and laughter episodes analysed according to who laughed, who the source of “the laughable” was, what the reason for laughing was and at what point laughter occurred. The analysis reveals that a majority of laughter was non-humorous, produced by one person, and had the function of mitigating face threats to speakers and others. Humorous laughter was usually produced by more than one person and had the function of relieving tension, creating a non-adversarial atmosphere and building a community. These results are connected to the communicative purposes of the participants; the participants’ mutual aim is to examine an academic work and confirm the candidate’s membership in their chosen specialisation, which requires cooperation from all parties. Furthermore, although the participants come from different research cultures where humour can have a different presence and function, this study shows that laughter and humour are frequent and fill an important function in ELF interactions in high-stakes academic situations.

Laughter and humour in high-stakes academic ELF interactions: an analysis of laughter episodes in PhD defences/vivas