In the "blue eyes/brown eyes" exercise created by Jane Elliott in the 1960s, she divided a group of schoolchildren by eye color and characterized one of them (e.g., the blue eyed group) as an inferior group. The aim of the exercise is to show how racism works and how it feels to be discriminated against.
Is the exercise effective? What are the psychological consequences of it? Does the exercise still "work" today? What are the ethics when this exercise is done with adults or children?