And how beneficial is telling people they have a mental disorder if they experience common issues that even healthy people experience? A mental disorder has to significantly impact your life for a long period. A symptom list that consists solely of freezing up when put on the spot in a rare high-stakes situation is not going to qualify. Any teacher can tell you this happens to everyone. Stop right in the middle of lecture, point at one student suddenly, and ask them a quick question that demands a quick answer and wait. The most common response will be "uh!uh!..." even when they know the answer. It's about the situation itself that people weren't ready for, not the specific facts they were asked about. You indeed need to practice retrieving information under the particular circumstances to build the confidence to not freeze up like that.