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Screen Brain - These days most of us are surrounded by screens, be it computers at work and in the home, smartphones, tablets and televisions. But what are the effects of this high screen usage on our brains? We hear from Baroness Susan Greenfield, who claims that such behaviour will have a massive impact on our minds and the ways in which we interact with each other. Plus we gauge the current research taking place in Scotland in this area, which is in its infancy.