This blog post is about a paper written in 1954 by Paul M. Fitts. This paper, titled The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement, contains the description of what is now called Fitts's law. In the general case it shows that how much time it takes to perform a task is based on the distance something must travel to perform an action, and how accurate the action must be. This law has proven to be near infallible over the years and is an excellent way to analyze efficiency of a task.
While the paper was math-dense and the descriptions were very general, I think it is these things that keep Fitts's findings alive even now. One thing I am very curious about is an analysis of various keyboard configurations using Fitts's law to see how they compare.
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