Attitude includes three main component congnitive behavioural and feeling. Changes can be brought in individual's perception, thought and attitude by cognitive development. Cognition means understanding, knowledge and also pass it to other people. Cognitive change proves to be very effective to reduce prejudice. Cognitive change can be brought among people by social workers, religious leaders and famous people of the society. The number of expensive marriages reduced due to organization of group marriage by different communities and organizations. Discussions and publicity for awareness about health and different products have positive effect upon people.