Yep this is the stuff that keeps me up at night so to speak. I'd love to do experiments like the ones you suggest. I'm an audio recording engineer and the crazy thing is I use this same brain trick on vocalists who are not stutterers. If they are struggling getting a certain singing performance down I'll go thru all the motions that make it look as if I'm no longer recording. I'll then say I have a technical issue and need to loop the music for a minute while I sort it out and I won't be able to record during that. But I say "feel free to practice or mess around during it, I'll leave your headphones on. Just be aware I won't be able to capture anything you perform so if you get something good, don't forget it! And we'll catch it for real when I sort this technical issue out". It's a dirty trick but works every time. The artist sure enough starts singing their line "practicing" after a few loops pass simply out of boredom and they obviously feel no pressure and they even see me deep in a (fake) tangle of wires. As soon as I hear a perfect performance I stop playback. And act surprised that it was in fact recording. Their confidence skyrockets and they are elated that were able to pull off the performance without really "trying". I need a double blind version of this for myself. Lol. Some other observations: If I use a finger and tap the rhythm of the syllables I'm speaking on my leg, my blocks go away and my stutter is greatly reduced. Something about the brain diverting resources to the motor movements of my finger and tapping keeps the bulk of the verbal pathways on a less friction path. If I sing the words I'm trying to say in a familiar tune (like the national anthem) my stutter is reduced to zero. But obvs this is only useful when alone or for therapy. Finally, if I alter my voice in any way (a British accent, a cartoon voice, a whisper, anything different than my own voice) my blocks and stutter are also reduced to zero. These must all be linked to resources the brain uses for the additional acts I'm adding to the singular act of speaking and somehow it's like my brain has no RAM available to stutter. Crazy stuff