Who have done poorly?

I cannot understand the meaning of sentence "when told they’ve done poorly on a trivia test, they even identify more strongly with their school’s winning teams".

Does it mean "when they were told that their performance on a trivial test had failed, they even more strongly support their school's other team which had done a good performance?


Context:
Researchers have long known that people cling to their personal biases more tightly when feeling threatened. After thinking about their own inevitable death, they become more patriotic, more religious and less tolerant of outsiders, studies find. When insulted, they profess more loyalty to friends " and when told they’ve done poorly on a trivia test, they even identify more strongly with their school’s winning teams.

In a series of new papers, Dr. Proulx and Steven J. Heine, a professor of psychology at the University of British Columbia, argue that these findings are variations on the same process: maintaining meaning, or coherence. The brain evolved to predict, and it does so by identifying patterns.