"The likelihood of errors has a lot more to do with a person’s baseline motor abilities and their the design of a device than the particular difficulty of a pointing task."
"The a coefficient is a user- and device-specific constants." should be singular?
"Conceptually, this suggests that the likelihood of errors has a lot more to do with a person’s baseline motor abilities and their the design of a device than the particular..."
Other stuff
Add some gifs about pointing technologies (maybe set to play once, rather than continuous)
Add a graph of Fitt's law, manipulating a few variables (might allow to shrink the paragraph on the equation), spatial understanding without reference is sometimes challenging.
Is the equation necessary to the chapter?
Add a "guided session" that allows users to examine their own pointing
Add a key to the bottom of the equation
use the terms rather than the variables. I kept having to scroll up to remember what the a and b coefficients were.
Typos
"The likelihood of errors has a lot more to do with a person’s baseline motor abilities and their the design of a device than the particular difficulty of a pointing task."
"The a coefficient is a user- and device-specific constants." should be singular?
"Conceptually, this suggests that the likelihood of errors has a lot more to do with a person’s baseline motor abilities and their the design of a device than the particular..."
Other stuff