Despite having a stutter (a speech block to be specific) ever since i can remember, i never got bullied or mocked in school. I cant recall one time when someone made me feel bad because of my block. Actually, i was the guy in high school who wanted to answer questions from my teachers or present something in front of the whole class. I dont remember how bad my impediment was but it wasnt a problem, really. Ive noticed that my stutter gets worse at work, and even more now that i have a full time job straight out of college. Its definitely mostly psychological at least for me. Even when im relaxed i may block a little bit but nothing severe. When im under pressure, need to answer something quickly or speak in front of a lot of people about something important at work, is when my stutter gets more noticeable. So yeah at least for me, is more of an anxiety thing.