Relevance and Applicability of Hardware-independent Pointing Transfer Functions
summary
Hardware-dependent transfer functions in pixels per count change pointer behaviour across setups: a controlled study with 32 participants and 8 OS transfer functions finds 5 out of 8 transfer functions show a significant hardware effect even for small resolution differences. Two fixes are tested: scaling functions to device resolutions and selecting the closest OS acceleration; a second study with 16 participants on a 1D reciprocal task shows no performance difference between those methods. Two web-based tools generate equivalent functions, and the area between two curves metric matches assessor choices except once.
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