Differences in Fitts' Law Task Performance Based on Environment Scaling

13 years 11 months ago

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Haptics research has begun implementing haptic feedback in tasks of great precision and skill, such as robotic surgery. Haptic displays can represent task environments with arbitrary scaling. Fitts’ Law suggests differences in the scale of a workspace rendered on a visual display and in a haptic display should not affect performance of those tasks. However, interactions of great precision and skill may require understanding and verifying the inﬂuence of perceiving an environment with differing scales. This experiment measured whether mismatched haptic and visual display scalings inﬂuenced movement times. Each of ﬁve experiment treatments used different scales in the visual and in the haptic displays. A Friedman rank test showed a signiﬁcant difference across all treatments. A post hoc pairwise comparison showed a nearly signiﬁcant difference between two treatments. These ﬁndings suggest the need for further study using more participants and parametric statistics to measur...

Gregory S. Lee, Bhavani M. Thuraisingham

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