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7

ID must vary You cannot get the values of a and b if ID is constant. In fitting parameters to a model, you need at least as many conditions as parameters to estimate. You have two parameters (a and b), so you need at least two values of ID. I don't think it makes sense to make any assumptions about the values of one parameter (e.g., that b is 0). So your ...


4

Proximity is only half of Fitts' Law. Size is the other half. While displaying a radial menu around a cursor seems like it solves the proximity problem, the fact is it doesn't make things that much closer. The standard Windows Start or Mac Apple menu buttons are usually much farther away from the cursor, yet they are much easier and faster to hit than ...


2

I agree with @nightning finding directions and accurately mentioning them is difficult. Not sure what device you are targeting. But if that has an inbuilt compass then this solution may work. Ask the users to point out which direction is downhill and then select their elevation. Simple mockups to demonstrate how the first step can let the users just point ...


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The general name of this technique is the "Infinite Width" element. According to the Fitts' Law, there are two parameters which affects the time of reaching a target: a distance, and a width: Actually, the tabs in full-screen Chrome have infinite height, so you can use more specific name of the technique: "Infinite Height". Still, the "Infinite ...


1

Before anything, I only used LibreOffice once or twice so I'm nowhere close to an expert on that software, therefore this answer applies to general models, like in your screenshot, The above being said, I think the approach displayed on your image, is the correct one. The problem here is you seem to be considering the whole software screen as the viewport ...



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