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Access training games
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Physical Access
Physical Interface:
Movement and control
Specific joint range, movement type.
Control site
Part of body used for access, e.g. placement of
switch, finger used to point.
Action
Type of movement or action to activate.
Activation/Final Selection
Amount of pressure, duration and frequency of hits or
touches.
Positioning / Ergonomics
Examples:
Foot switch:
Movement - knee and ankle joints, Control site - foot,
Action - push, Activation - momentary push at appropriate time
Eye gaze:
Movement - eyes and possibly neck/head; Action - move
eyes left, right, up, down; Activation - sustained gaze at required item
Keyboard:
Movement - all upper limb joints; Control site -
fingers; Action - 2 fingers extended and press; Activation - pressure on
each key with filter keys set for extended pressure problem
examples:
Access Method:
Direct Select
Both hands
Left Hand
Right Hand
Foot/toes
Head Pointer
Eye gaze
Other …
Directed Selection
Mouse
Joystick
Switch Controlled Mouse Directions
Other Mouse Control
2 Or More Switch Scanning
Morse Code
Other …
Indirect Select
Single Switch Timed Scanning
Types of input equipment:
Touch screen
Keyboards
Pointers
Mouse pointing devices
Speech recognition
Handwriting recognition
Switches
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Essential concepts
for physical access:
 Movement
and activation should use the smallest movement, least physical
effort.
Stabilize
proximal joints.
Use
support for gravity assisted or eliminated
movement. |
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Click
here to see information on
physical access methods |
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Work process goals: Independence
Efficiency = (Rate +
Accuracy)
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All 3 goals of independence, rate and accuracy are
important in making decisions for physical access. It's not
enough to make decisions on potential tools based purely on 'if' a
student can use it or point to select for example. The
students efficiency, which includes both rate and accuracy, as well
as their overall levels of independence using the system should be
taken into account. |
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