Fitts’ Law as a Function of System Dynamics and Target Uncertainty
- 1 June 1978
- journal article
- research article
- Published by Taylor & Francis in Journal of Motor Behavior
- Vol. 10 (2) , 123-131
- https://doi.org/10.1080/00222895.1978.10735145
Abstract
Fitts’ law was found to hold for discrete movements executed by subjects controlling the velocity of a cursor with a control stick. The slope of movement time versus index of difficulty was approximately twice as large as for a comparable position control system. Target uncertainty also increased the slope of total time versus index of difficulty, and this effect is interpreted in terms of adaptive tuning of the human movement system.Keywords
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