An example of nurture vs. nature as a cause for behavior in children.
The Jane Elliot "Blue Eyes - Brown Eyes" experiment:
Shortly after MLK was assassinated: The experiment was conducted by a third-grade teacher, Jane Elliot, in Iowa.
The experiment is summarized below:
"... she designated the blue-eyed children as the superior group. She gave the blue-eyed children extra privileges. Blue-eyed children were encouraged to play only with other blue-eyed children and to ignore those with brown eyes. Elliott would not allow brown-eyed and blue-eyed children to drink from the same water fountain. She often exemplified the differences between the two groups by singling out students and would use negative aspects of brown-eyed children to emphasize a point."
She told the class "brown-eyed people are lesser than blue-eyed and that they must wear collars so people could tell who had brown eyes. She told her students that brown-eyed people are slower, dumber, worse listeners, didn’t know how to behave"
"At first, there was resistance among the students in the minority group to the idea that blue-eyed children were better than brown-eyed children. To counter this, Elliott lied to the children by stating that
melanin was linked to their higher intelligence and learning ability. Shortly thereafter, this initial resistance fell away. Those who were deemed "superior" became arrogant, bossy, and otherwise unpleasant to their "inferior" classmates. Their grades on simple tests were better, and they completed mathematical and reading tasks that had seemed outside their ability before. The "inferior" classmates also transformed – into timid and subservient children who scored more poorly on tests, and even during recess isolated themselves, including those who had previously been dominant in the class. These children's academic performance suffered, even with tasks that had been simple before."
Jane Elliott - Wikipedia
Stereotyping Experiment: "A Class Divided" Summary and Analysis
A picture of the children wearing collars is below.