The science of personnel selection is over a hundred years old yet decision-makers still tend to play it by ear, or believe in tools that have little academic rigour. When managers are asked how they go about identifying talent, their most common response is ‘I know it when I see it’, or ‘well, you just know’. Yet there is conclusive evidence indicating that decisions based on intuition are almost always biased (and therefore less effective) than those based on data or actual evidence. An important reason why talent isn’t measured more scientifically is the belief that rigorous tests are difficult and time-consuming to administer, and that subjective evaluations seem to do the job ‘just fine’. However, there is a well-established return on investment for academically defensible methods, and a high cost for trusting one’s own instincts. This is problematic: if you start your talent management programmes without the ability to identify talent, you will not get very far.