What CAUSES stuttering? (according to a master student in Neuropsychology)

What CAUSES stuttering? (according to a master student in Neuropsychology) My original post was deleted (see screenshots [\#1 ](https://drive.google.com/file/d/1tkF_laiEo0LN_9fyF-181MsvRY7izmmv/view?usp=sharing)and [\#2](https://i.imgur.com/mO01I1o.png)) with the reason: “*It must be posted in the research thread*.” So I’ve added it there instead — you can read it in the research thread here: [https://www.reddit.com/r/Stutter/comments/1hzqgdz/comment/moh2zbg/?utm\_source=share&utm\_medium=web3x&utm\_name=web3xcss&utm\_term=1&utm\_content=share\_button](https://www.reddit.com/r/Stutter/comments/1hzqgdz/comment/moh2zbg/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)