Coaches and organisations seeking to enhance team performance would do well to focus on the team member most likely to go the extra mile, and to encourage other members to step up their interaction with this individual. Single individuals can have a disproportionate impact on group performance, suggest researchers from the University of Iowa in the US. Their research demonstrates how ‘extra-milers’ put in remarkable efforts to make sure the team holds together. The study looked at patterns of performance in a Chinese petrochemical company of 87 seven-strong teams. It suggests that teams...