Well... let's untangle this a bit: I say it's not common for stutter to be _determined_ in such a strict way, if that is in fact what's going on. And even if dopamine _can_ be released by screen use - even though it's difficult to see how all screen use should necessarily be classified as "the same" regardless - that's not to say it's a determining mechanic for us. It's also not defined that stutter comes from too much dopamine. And also, if we know of cases where screen use _doesn't_ aggrevate stutter consistently, we don't have to think of it that way. Incidentally, the reason I call it "not common" is exactly because I haven't heard any stutterer describe such a narrow determination before. - So, I think my comment makes sense on its own, and that your comment is moving in another direction, which doesn't go against my comment, but also isn't talking about the same thing anymore. - The point should be for OP to figure out what's going on in their case, don't you think? - --- - *Moved from above:* If this is something you can reproduce without fail, and you encounter no stutter variance except for these two cases, you should go get it checked out by a doctor. It's not common that an activity in this way determines stutter.