Researchers studied why some people perform better on tests. 

They found that it's not necessarily related to intelligence. 

Some people become anxious during exams and divert mental energy toward anxiety instead of expending it on finding the right answers. 

Others have a better grasp of how tests work. They use process of elimination and other techniques to help them make better choices. 

Some people study harder. They start early, make flashcards, rely on repetition to retrieve answers when they need them. 

Tests don't always measure how much you know. They measure how well you take tests. 

And tests certainly don't measure your worth. 

But knowing that doesn't make it hurt less when you don't succeed.