When A = Amplitude, G = Gain, and W = target width, Fitts' law is expressed by the equation: MT =
A) G + Log (A)
B) Log (2A/W)
C) Log (W/2A)
D) Log (G + W)

Question

Quizplus · Accepted Answer

Fitts' law is a model that predicts the time required to rapidly move to a target area, such as in pointing tasks or in human-computer interaction. It is expressed as MT = a + b * Log2(2A/W), where MT is the movement time, A is the amplitude (distance to the target), W is the width of the target, and a and b are constants. The correct expression that matches this model, given the options, is Log(2A/W), which simplifies the model's equation by excluding the constants a and b.

When a = Amplitude, G = Gain, and W =