Part 2: Finding the right switch position

The positioning of switches is critical for children who have physical difficulties, and assessment should always take place with close collaboration between the student and people who are involved with the student - parents, physiotherapist, occupational therapist, carers, etc. A switch user needs to be able to:

• hit the switch when they want to
• not hit the switch when they don't want to
• use the least possible physical effort
• be able to maintain attention on what they are controlling
• use the switch without causing physical harm (eg repetitive strain injury)

For users who have severe physical difficulties, look for a consistent voluntary movement. Some users will find that they can control a movement of their head, elbow, knee or foot more accurately than their hand. If so, a universal mounting system (from Inclusive Technology) can hold the switch in the correct position.

If a switch placed directly onto the users tray or table is appropriate, ensure that it is securely fixed. A Maxess board (available from SEMERC) provides a flexible, secure base for a switch which has self adhesive 'hook' velcro on the bottom (available in rolls or pads). The permanent fixing of a switch is unwise, as the user's abilities may change from day to day - flexibility is best!

A user may be able to hit a switch which is placed flat on their tray, but may have difficulty releasing it. Try angling the switch on a wedge (available from SEMERC)

Suppliers:
SEMERC 0161 827 2927 www.semerc.com
Inclusive Technology 01457 819790 www.inclusive.co.uk

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