ICSH 2015: Smart Health pp 210-216 | Cite as
Relationship Between Multiple Joint Movements Using Fitts Law
Abstract
Fitts Law predicts the time required to move to an object given the distance to the object’s center and its size. Over the years, Fitts law has been tested on various body parts/joints such as the elbow, wrist, fingers and even tongues. In this paper, we extend Fitts law to model movement by multiple joints. To accomplish this, we first establish a relationship between the performances of different joints, using the concept of atomic movement. We define the atomic movement as the movement of the fastest joint from amongst the joints under consideration. We propose that every other joint movement is a multiple of this atomic movement.
Keywords
Fitts law Prosthetic limb controller Human robot interface Atomic movementNotes
Acknowledgements
This work is partially supported by the National Science Foundation under grants CNS-0751205, CNS-0821736 and CNS-1545599.
References
- 1.Fitts, P.M.: The information capacity of the human motor system in controlling the amplitude of movement. J. Exp. Psychol. 47, 381–391 (1954)CrossRefGoogle Scholar
- 2.MacKenzie, I.S., Buxton, W.: Extending Fitts’ law to two-dimensional tasks. In: Proceedings of the CHI 1992 Conference on Human Factors in Computing Systems, pp. 219–226. ACM, New York (1992)Google Scholar
- 3.Murata, A., Iwase, H.: Extending Fitts’ law to a three-dimensional pointing task. Hum. Mov. Sci. 20, 791–805 (2001)CrossRefGoogle Scholar
- 4.Guiard, Y.: Fitts’ law in the discrete vs. cyclical paradigm. Hum. Mov. Sci. 16, 97–131 (1997)MathSciNetCrossRefGoogle Scholar
- 5.Balakrishnan, R., MacKenzie, I.S.: Performance differences in the fingers, wrist, and forearm in computer input control. In: Proceedings of the ACM Conference on Human Factors in Computing Systems - CHI 1997, pp. 303–310. ACM, New York (1997)Google Scholar
- 6.Shannon, C.E., Weaver, W.: The Mathematical Theory of Communication. University of Illinois Press, Urbana (1949)MATHGoogle Scholar