If you've recently applied for a job, you may have been asked to fill out a personality test. From banks and consultancy firms to fast-food outlets, they're increasingly being used as a way to improve efficiency and perceived fairness in recruitment.The most common tests used for these purposes are based on the so-called 'big 5' personality traits that psychologists have settled on as providing a good indication of just what makes us tick. Such personality tests take the form of a questionnaire in which the participant indicates their alignment with statements concerning human behaviour,... Like this podcast? Please help us by supporting the Naked Scientists