Being left- or right-handed can change how you view the world and even influence how you vote in an election, say scientists.Right-handers are more likely to buy products on shelves to the right of them and vote for names on that side of ballot forms. For "lefties", it's the reverse.Dr Daniel Casasanto, of Chicago University, said people unconsciously favoured the side they found the most dexterous and less clumsy. It means if a right-hander sees two equally attractive people in a bar, they will choose the person to their right instinctively."It's nothing to do with using your hands when you respond," he told the Association for the Advancement of Science conference in Washington DC.The difference also extends to the brain.For right-handers, the happiness and creative centres of the brain are on the left side, but it is the reverse for left-handed people. It means therapies that target specific parts of the brain may have a detrimental effect depending on the dominant hand. ..