What is 'contact hypothesis' in sociology?

Also known as the inter-group contact theory, this refers to the hypothesis that people-to-people contact may be a good way to resolve conflict between groups. It was proposed by American psychologist Gordon W. Allport. The contact hypothesis is based on the idea that peaceful and friendly interpersonal contact can help in reducing prejudices between groups and foster better cooperation and friendly relationships. Some believe that such interpersonal contact between people can help reduce conflict by increasing interdependence between the groups. In other words, the cost of conflict increases with greater interdependence.

Source: The Hindu, 15/11/2018