Are we kinder to people like us?

Using the results of the Kindness Test, which 60,000 people took part in, Claudia Hammond asks whether we are kinder to people who we think are like us? And what happens once we move beyond family and friends to acquaintances and strangers. What can the evidence tell us about who it is that we choose to be kind to and why? Presenter: Claudia Hammond Producer: Erika Wright