The very act of acknowledging that they are African-Americans when given a test ignites in them thoughts of their own stereotype which is negative regarding academics and that makes them do worse.

在测试中承认他们是非裔美国人的行为会激发他们对自己的刻板印象的思考，而这种刻板印象会对学术人士造成负面影响，使他们做得更差。