⏱ Movement time §

= the time it takes to reach a UI-element

Formulas §

🖱 Fitts Law §

$MT:$ movement time (seconds)

$a:$ input device-dependent constant (seconds) → draw a straight through points → a = where it hits y-axis

$b:$ input device-dependent constant (seconds/bit) → = the slope of the straight from a (Steigungsdreieck)

$ID:$ Index of difficulty (fitts law) (bits) $MT=a+b\ast ID$

🚗 Steering law §

$MT:$ movement time $a:$ input device-dependent constant $b:$ input device-dependent constant $ID:$ Index of difficulty (steering law) $MT=a+b\ast ID$