Extending Fitts' Law to Two-Dimensional Tasks

Abstract

Fitts' law, a one-dimensional model of human movement, is commonly applied to two-dimensional target acquisition tasks on interactive computing systems. For rectangular targets, such as words, it is demonstrated that the model can break down and yield unrealistically low (even negative!) ratings for a task's index of difficulty (ID). The Shannon formulation… (More)
DOI: 10.1145/142750.142794

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