If you have no language, how can you make yourself understood, let alone make friends? Phoebe Caldwell has worked for many years with people with severe intellectual disabilities and/or autistic spectrum disorder who are non-verbal, and whose inability to communicate has led to unhappy and often violent behaviour. In this new book she explores the nature of close relationships, and shows how these are based not so much on words as on the ability to listen, pay attention, and respond in terms that are familiar to the other person. This is the key to Intensive Interaction, which she shows is a...