Michael Rosen meets parents, researchers and carers to explore the ways we communicate with people with autism or profound learning disabilities. Phoebe Caldwell talks about the principles of "intensive interaction", and why listening and non verbal communication are central to her work. Researchers at the Norah Fry Research Centre in Bristol explain why changing the way we communicate with people with disabilities can challenge preconceptions, and make relationships more open, friendly and equal. And Ruth Hendery, the head teacher at St Crispin's special school in Edinburgh, explains how communication works in her school, and why it's so important to get it right.

Producer: Chris Ledgard.