Well, I can't verbalize it formally and most of it just observations of my own stutter. As far as I know, there might as well be a bunch of different kinds of stutters and mine mostly is due to social anxiety. What you presented above gave me a clearer idea on how I can think of my stutter and seems very plausible to my case. I few things that I am not sure of is why do I stutter on certain sounds more than the others? Does it depend on the type of muscles I involuntarily stress during a block? Why can I sing without a stutter even when I dread it in front of people? If emotions and social conditions do play a huge role, why does it not affect me when I am singing? I am also pretty sure that I stutter sometimes due to my anticipation of stuttering like how you can grow anxious of your own anxiety you know? There are also times when a severe random block pops up when I am in complete flow most of the time, why does that happen out of nowhere? Is it because of my conditioning over the years that my mouth acts up even when I am completely calm and in control like the pavlov's dog example? This one is interesting to me, why do stutter less when I speak in english and even less when I force an accent that I do not have compared to speaking in my native tongue? This is the one thing I cant fit it in any theories, but its absolutely true in my case at the very least.