W3 L2 - Input Models
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6 Terms
2D Fitts law width
Width changes when going across an object. The width of the object is the width from one side to the other across the direction of the users input
2D Fitts law distance
Distance is from the current cursor position to the CENTER of a target
Goal-Crossing
Pointing - Aim is to click object, so cursor must stop on the object
Crossing - Aim is to cross object, so cursor has no need to decelerate
Steering Law
MT changes if changes in direction are required
Tunnels
Eg: Drop-downs
Keystroke-Level Model (KLM)
Set of basic input operators and time estimates for their execution
Physical motor operators
Eg: pressing key, pointing with mouse
Mental operators
Eg: Mental prep for a motor action, time to make a decision
Can use these estimates to estimate the time to complete an action
Eg: Convert currencies on currency converting website. Figure out actions and add up times.
Note 
Flashcards (50)