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

他们考试时承认自己是美国黑人，恰是这一行为激发了内心关于黑人的刻板印象，认为黑人学术水平不行，从而导致他们考得差。

The way act of acknowledging that their African-American when given a test ignites in them thoughts of their own stereotype, which is negative, regarding makes them do worse.

单单是这个让他注明自己是非裔美国人的举动，就会引他想到自己种族给人留下的固有印象：不擅长学习，这让他们的表现更糟糕。