The corporate buzzwords of the moment: unconscious bias and diversity training. These training programmes have been introduced to organisations across the world over decades, with high hopes that they will make workplaces more inclusive. In the US alone, companies spend $8billion a year on diversity training. But do they work? This is a question we ask attendees at our ‘What works for diversity and inclusion?’ workshops regularly. Between about 11% and 50% of attendees at recent workshops think that unconscious bias training (UBT) decreases bias and discrimination in the workplace. However, the evidence base tells a different, murkier story.