Not stuttering/stuttering less when you're alone is a pretty common experience with people who stutter, I personally still stutter sometimes even when I'm talking to myself. There's been pretty strong evidence that stuttering is primarily neurological, not psychological. I know another user, a neurologist I believe, has made some very good posts about the neurology of stuttering. I'm not doubting the idea of "trying not to stutter" or anxiety making your stutter worse, but to say that that's the \*cause\* of stuttering is just incorrect to me. If stuttering was caused by "being uncomfortable after a repetition", I think a lot more people would stutter. Edit: "when you're alone"