In Fitt's Law, what happens to movement time when distance increases or target width decreases?

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Multiple Choice

In Fitt's Law, what happens to movement time when distance increases or target width decreases?

Fitt's Law says movement time increases as the task becomes harder, defined by distance to the target and the target width. The rule MT = a + b log2(2D/W) shows that when distance D grows or target width W shrinks, the index of difficulty log2(2D/W) goes up, so you need more time to complete the movement. So, moving farther or aiming for a smaller target takes more time; it won’t decrease, stay the same, or drop to zero.

Fitt's Law says movement time increases as the task becomes harder, defined by distance to the target and the target width. The rule MT = a + b log2(2D/W) shows that when distance D grows or target width W shrinks, the index of difficulty log2(2D/W) goes up, so you need more time to complete the movement. So, moving farther or aiming for a smaller target takes more time; it won’t decrease, stay the same, or drop to zero.

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