1
Q
Common examples of control interfaces:
A
- Keyboard
- Joystick
- Light switch
2
Q
SPATIAL Characteristics of Control Interfaces
A
- Size of target
- Spacing of target
- Target’s overall physical size
3
Q
Proportional Joystick
A
Requires that client can grade force and distance of movement.
4
Q
Switch Encoding
A
- The individual who lacks the ROM or fine-motor control necessary to use a physical or graphical keyboard may be able to use a SWITCH ENCODING INPUT METHOD.
- In Switch Encoding, a small set of switches from one to nine is used to directly access the functionality of the device. An example is Morse Code, a highly efficient method of typing for a person with severe motor control limitations.
5
Q
ROM required to use a switch array with multiple switches
A
Client’s fine motor must be more refined than for a single switch, but less refined than for a keyboard.
6
Q
Pneumatic (respiratory) control
A
Interface controlled by client’s amount of inhalation/exhalation (ie: sip n’ puff)
7
Q
Parameters to determine control interface’s effectiveness:
A
- Monitor fatigue levels
- Ensure client and control are properly positioned
- Track speed and accuracy of task completion
8
Q
Examples of Mechanical Switches
A
Paddle, plate, button, wobble, lever and membrane
9
Q
Considerations for eye-controlled system:
A
- Ability to maintain steady head position
- Smooth vertical/horizontal eye movements through majority of range
- Ability to focus on target for sufficient time
10
Q
Elements in the Human-Technology interface:
A
- Feedback from device (control interface) to person
- User’s motor, sensory, and cog abilities that influence control of the interface
- Positioning of control interface
