Abstract

Fitts' law is a linear equation relating movement time to an index of movement difficulty. The recent finding that Fitts' law applies to voluntary movement of the vocal tract raises the question of whether the theory of speech production implies Fitts' law. The present letter establishes a theoretical connection between Fitts' law and the Task Dynamics model of speech production. We derive a variant of Fitts' law where the intercept and slope are functions of the parameters of the Task Dynamics model and the index of difficulty is a product logarithm, or Lambert W function, rather than a logarithm.

Date

January 14, 2020

Authors

Tanner Sorensen, Adam Lammert, Louis Goldstein, Shrikanth Narayanan

Journal

arXiv preprint arXiv:2001.05044