Operation of an AAC on an iPhone/iPad with a single switch using the Tecla Shield is quite simple. iOS has a “switch control” setting that, when turned on, allows cycling through the icons on the screen in “groups”. In the AAC app, the device would scan from the top of the screen to the bottom through groups of icons. When a group is selected, the device then scans through the icons in that group until the user clicks again. In this way, the different words on the screen can be selected and sentences can be built to then be spoken by the device.

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