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Have you given up on your New Year’s resolution yet? Every year many of us make the promise to become better, shinier, more accomplished versions of ourselves by the same time next year. It’s often easier said than done but to an extent it really is the thought that counts. David Robson, author of ‘The Expectation Effect’ says the power of our expectations can cause real physiological effects but Mike Hall, co-director of ‘The Skeptic’ magazine isn’t convinced.