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Selecting The Proper Controls - Coggle Diagram
Selecting The Proper Controls
Keyboard Versus Mouse
Mouse
Pointing Speed:
1.5 to 2 seconds
Typing Speeds
in 1.5 to 2 seconds:
Skilled typist 13 to 15 characters
Average typist 4 to 6 characters
Pointing and Dragging:
Positioning speed and accuracy for stationary targets
Indirect devices do not differ greatly
Separate confirmation action following pointer positioning
Increases pointing accuracy but reduces speed
Pointing at stationary targets
Direct devices
Tracking small, slowly moving targets
Mouse, trackball, and graphic tablet preferred
Guidelines For Selecting The Proper Controls
3. Consider the characteristics of the hardware
2. Consider user characteristics and preferences
Provide keyboards for touch typists
4. Consider the characteristics of the application
1.Consider the characteristics of the task
Provide an alternative pointing device for graphical or drawing tasks
Provide touch screens under the following conditions:
Targets are large, discrete, and spread out
Frequency of use is low
Desk space is at a premium
Little or no text input requirement exists
The opportunity for training is minimal
Provide keyboards for tasks involving:
Heavy text entry and manipulation
Movement through structured array of objects
5. Provide flexibility
6. Minimize device eye and hand movements
Pointer Guidelines
Use only as many shapes as necessary to inform the user about current location
and status but too many will confuse
Be conservative in making changes as the pointer moves across the screen
Provide a short “time out” before making non critical changes on the screen
The shape of a pointer:
Should be constructed of already defined shapes
Should not be used for any other purpose other than its already defined meaning
Should clearly indicate its purpose and meaning
Do not create new shapes for defined standard functions
Animation should not:
Restrict one’s ability to interact
Distract
The user should always position
the pointer
The pointer:
Should maintain its size across all locations and movement
The hotspot should be easy to
locate and see
Should contrast well with its
background
Location should not warp
(change
Should be visible at all times