This is the original study: https://digital.library.unt.edu/ark:/67531/metadc799207/m2/1/high_res_d/vol20-no3-191.pdf
This is the continuation too:
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This is so cartoonishly racist it's literally the kind of thing I'd expect in a sitcom.
I think what's crazy is reading the really saddening paragraph by the black kid's mother and you can feel the love in it, only to get one heck of a gut punch with the disgusting racism that comes after.
When you forget the mother's painful paragraph, the white pair's racism is ludicrously comical; but this was an awesome kid who lost his life and the recipient is a repulsive racist.