We developed four enhanced area cursors, two of which utilize goal crossing and two of which utilize magnification.
Findlater, L., Jansen, A., Shinohara, K., Dixon, M., Kamb, P., Rakita, J. and Wobbrock, J.O. (2010). Enhanced area cursors: Reducing fine-pointing demands for people with motor impairments. Proceedings of the ACM Symposium on User Interface Software and Technology (UIST '10). New York, NY (October 3-6, 2010). New York: ACM Press, pp. 153-162.
The Pointing Magnifier, a refined version of one enhanced area cursor, utilized visual- and motor-space magnification to make targets easier to acquire. It runs on any Windows system as a mouse cursor replacement.
Jansen, A., Findlater, L. and Wobbrock, J.O. (2011). From the lab to the world: Lessons from extending a pointing technique for real-world use. Extended Abstracts of the ACM Conference on Human Factors in Computing Systems (CHI '11). Vancouver, British Columbia (May 7-12, 2011). New York: ACM Press, pp. 1867-1872.
The Angle Mouse makes pointing more accurate for people with motor impairments by dynamically adjusting the mouse control-display gain (mouse sensitivity) as a person tries to acquire a target. The Angle Mouse observes the angles created during movement to understand how to increase and decrease the gain to make the user more accurate.
Wobbrock, J.O., Fogarty, J., Liu, S., Kimuro, S. and Harada, S. (2009). The Angle Mouse: Target-agnostic dynamic gain adjustment based on angular deviation. Proceedings of the ACM Conference on Human Factors in Computing Systems (CHI '09). Boston, Massachusetts (April 4-9, 2009). New York: ACM Press, pp. 1401-1410.