confidence is a part for sure. so it being distracted. i find that for me mildly thinking about stuttering is when its the worst: if i am focusing on it i rarely stutter (but that is exhausting) but if i can enter zen/flow/zone mode then its all smooth. im trying right now to practice not thinking about stuttering at all. it is very hard to do but when i replay the day when going to bed (anyone else do that?) i notice i stuttered a lot less (or at least remember stuttering less) if i was very engrossed in an activity.