Proceedings of the 31st International BCS Human Computer Interaction Conference (HCI 2017) (HCI)
digital make-believe, with delegates considering our expansive
3 - 6 July 2017
We explore the role of timing in situations where a human user and semi-autonomous software can each initiate actions, building on cognitive theories of rhythmic expectation and mutual temporal adaptation during conversation. Two controlled experiments demonstrate that adjustments to the rhythm of back-and- forth interaction have significant effects on perceived agency, task performance and stress. Conclusions include design guidance that establishing a predictable rhythm of interaction is likely to be beneficial for mixed initiative systems.