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Design principles of hand gesture interfaces for microinteractions
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This paper concludes the nine months progress of my Ph.D. project. It specifies its research focus on investigating microinteractions -- a sub-topic of HCI and gesture research -- and on developing a frame work for applications, which use microgestures for supporting everyday tasks through invisible and context-aware appearing interface layers underneath object-grasping hands. In an expert study, I explore the motor limitations and opportunities of microgestures while grasping objects and valued manual dual-task scenarios by walking through three tasks, with usage of grasping probs. The study's outcome is a generic microgesture set for different grasp types and a collection of parameters that have a relevant effect on the choice of the grasping tasks. A further user study in progress is investigating the effect of grasped object, such as handheld devices, on the feasibility of microgestures. In this study users are asked to perform finger-tip and drags on the front and/or back side of a held device. For this user study I have used a two-sided touch-sensitive device by stacking 2 pads together to a sandwich-like prototype. This allows tracking users' finger gestures through camera as well as through front and touch screens. The outcome of the two mentioned studies will describe a design space for out-of-a-grasp microgestures. At the ECCE doctoral consortium I aim to present this design space and discuss how this can serve as a base for developing a framework for out-of-grasp microinteractions that are subtasks of grasping tasks. The microinteractions will be developed to support the grasp tasks regarding their perceived ergonomic and hedonic qualities.