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AbstractConversational interfaces that interact with humans need to continuously establish, maintain and repair common ground in task-oriented dialogues. Uncertainty, repairs and acknowledgements are expressed in user behaviour in the continuous efforts of the conversational partners to maintain mutual understanding. Users change their behaviour when interacting with systems in different forms of embodiment, which affects the abilities of these interfaces to observe users' recurrent socialdoi:10.1007/s12193-021-00366-y fatcat:p5msjl2r6rhplb346xjkml4pti