Pointing while Looking Elsewhere: Designing for Varying Degrees of Visual Guidance during Manual ...
summary
Eye tracking plus a large touch display distinguishes touches made with or without visual guidance and treats uncertain touches with area cursor scaling and gaze-context disambiguation. A two-stage study with the eye tracker reports positional spread as gaze-target distance increases, summarized by 95% confidence circles across four distance bins. Three prototype apps (painting, map focus, image exploration) show warping or progressive zooming to resolve ambiguity; users find the technique unintuitive at first but often adapt within a few trials.
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