EVALUATION

Sherif
Sherif's method may have only been successful because his groups and the prejudice between them were artificially created. However, his method did show that if two groups work together to achieve a common goal, prejudice can be reduced.

Aronson
Aronson found that his jigsaw method did lead to prejudice between the racial groups being reduced. However, the positive perceptions of the other racial groups were not generalized outside of the classroom.

Elliot
Elliot's research could be considered unethical as the children suffered from psychological stress. However, when she contacted the students nine years later, they were more tolerant and showed more empathy towards others, than children who had not experienced her lesson.

Harwood
Information gathered from interviews are not always reliable. There are people who don't have regular contact with their grandparents and still have positive attitudes towards the elderly.