In this paper, we investigate augmented reality (AR) to support caregivers. We implemented a system called Care Lenses that supported various care tasks on AR head-mounted devices. For its application, one question concerned how caregivers could interact with the system while providing care (i.e., while using one or both hands for care tasks). Therefore, we compared two mechanisms to interact with the Care Lenses (handheld touch similar to touchpads and touchscreens and head gestures). We found that head gestures were difficult to apply in practice, but except for that the head gesture support was as usable and useful as handheld touch interaction, although the study participants were much more familiar with the handheld touch control. We conclude that head gestures can be a good means to enable AR support in care, and we provide design considerations to make them more applicable in practice.
How to Interact with Augmented Reality Head Mounted Devices in Care Work? A Study Comparing Handheld Touch (Hands-on) and Gesture (Hands-free) Interaction.
AIS Transactions on Human-Computer Interaction, 11(3), 157-178.