For more than 10 years, he has conducted studies into whether modifying behaviour can be as effective at treating insomnia as taking medication. His research focuses on CBT cognitive behavioural therapy, a treatment that psychologists often use when working with patients suffering from depression, anxiety disorders or phobias. The therapy has two parts. Patients are taught to identify and challenge worrying thoughts when they come up. At the same time, they are asked to record all of their daily actions so that they can visualise the outcome of their choices."

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