Switch Access

What is a switch?

• A switch is a device for simulating mouse and / or keyboard actions for users who are unable to use standard mice or keyboards. 

• A mouse button can be regarded as a switch, as can a single key on a keyboard.

• A switch can be used by a person with severe and complex disabilities to help them interact with a computer or tablet device. 

• A switch, paired with appropriate software and hardware, can also be used to control an individual's environment.

An individual can use a switch to:

• Operate a toy to help develop an understanding of ‘cause and effect'.

• Access a communication aid or control their computer.

• Control devices at home in conjunction with an environmental control system such as a Powerlink.

Switches and Scanning

Switch scanning is an advanced selection technique to help navigate, identify and target selected items.

Switch scanning should be seen as a progression as it requires time to develop both cognitive and physical skills to successfully achieve accurate switch scanning.

Types of switch scanning

• Single-switch scanning - using an ‘indicator' or ‘highlight' to move through items on a computer or tablet one at a time, sometimes referred to as ‘step scanning' When the desired item is highlighted the user activates the switch.

• Two-switch scanning - similar to single switch scanning but with two switches, e.g. one to activate the cursor and one to select the item.

It is important to have a proper assessment to determine the most suitable type of switch and the best access method. 

Taken and modified from: https://www.callscotland.org.uk/information/alternative-access/switches/