Why is it good to do the exercise?

You might assume it is a person’s disapproval of another group that leads to discrimination. And indeed this is one aspect of it. But according to an extensive survey of research into grouping and discrimination, this is not the principal problem. Researchers Daniel Balliet, Junhui Wu, and Carsten De Dreu found that it is rather our tendency to enjoy our in-group that most contributes towards discrimination of other groups. What is an in-group? A category of people that you identify with and belong to. This may be your team or people of the same sex, educational background, or origin.