When a person is looking for a way to communicate in alternative ways, they need to find something that really works for them. They need to try to find a voice that sounds natural. They want to try to find a way to be efficient. They want to be able to communicate as normally as possible, even though they're not using their biological voice.
The World Health Organization has developed the ‘International Classification of Function’. This gives us a way to think about any health condition. Here we can see many ideas that we need to think about with CP. We can also see how these many ideas are connected to one another.