W3 L2 - Input Models

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6 Terms

1
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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

<p>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</p>
2
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2D Fitts law distance

Distance is from the current cursor position to the CENTER of a target

<p>Distance is from the current cursor position to the CENTER of a target</p>
3
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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

<p>Pointing - Aim is to click object, so cursor must stop on the object</p><p>Crossing - Aim is to cross object, so cursor has no need to decelerate</p>
4
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Steering Law

MT changes if changes in direction are required

<p>MT changes if changes in direction are required</p>
5
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Tunnels

Eg: Drop-downs

<p>Eg: Drop-downs</p>
6
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Keystroke-Level Model (KLM)

Set of basic input operators and time estimates for their execution

  1. Physical motor operators

    Eg: pressing key, pointing with mouse

  2. 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.

<p>Set of basic input operators and time estimates for their execution</p><ol><li><p>Physical motor operators</p><p>Eg: pressing key, pointing with mouse</p><p></p></li><li><p>Mental operators</p><p>Eg: Mental prep for a motor action, time to make a decision</p></li></ol><p></p><p>Can use these estimates to estimate the time to complete an action</p><p>Eg: Convert currencies on currency converting website. Figure out actions and add up times.</p>