Ask any driver how skilled they are at the wheel and they're bound to say they're above average (even though a large proportion of drivers must, by definition, be below average). This is just one example of what psychologists call a "self-serving bias" or the "above average" effect. It's part of the general tendency most of us have to view ourselves in a particularly favourable light. The obvious, egocentric explanation for why we do this is that it makes us feel better about ourselves. But ther