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Stuttering, or stammering as it's also often called, is a neurological condition based on the brain’s wiring that affects more than 70 million people worldwide. A three to four-day course called the McGuire Programme is trying to help people overcome stutters using a mixture of physical and psychological methods. Lifelong stutterer Dave McGuire founded the course in 1994. It has a demanding routine but the techniques have led to life-changing progress for many people.

Video journalist: Jack Burgess

(Image: Stutterer Signora gives a public speech on a box in Oslo city centre. Credit: Â鶹Éç.)