To clarify, his information is outdated and comes from the fact that dysfluency was incorrectly categorized as a speech/language disorder, instead of an anxiety-type thing. If you are over the age of 5 and struggle to say your name and address to another person (but have no trouble when alone), the cause of the speech block is definitely based in fear/anxiety. Someone with an impactful stutter has a biological predisposition to bumpy speech AND has experiences (usually as a young child) where they get the message that their age-appropriate repetitions are STRANGE. In their attempts to talk "normally", they put in more effort, while getting anticipatory fear/valsalva responses. These are the factors which CREATE full blocks. ​ I don't generally respect the DSM, but dysfluency has recently been correctly categoriezed as an social anxiety. The reason it's useful is this new iniformation can properly direct people to helpful ways to achieve sustainable control over their speech. Well-meaning people (like the speaker and many SLPs) give techniques which often work only for a brief period of time. They are usually fancier avoidance techniques to trick the brain into thinking it's a novel situation (bypassing fear response), so once your brain gets accustomed to the new situation, technique looses effectiveness. Other techniques teach you to speak with a very strange cadence. (Adding a zzzzz sound before words, taking a breath, extreme elongation etc). ​ He briefly mentions that reducing auditory feedback can lead to more fluency. During choral speech (talking simultaneously with a group), many people become fluent. It's simply because there is no longer pressure for you to get the words out fluently (you can just "join in" whenever, and no one will know that you skipped the first few words). You become fluent BECAUSE the pressure (anticipatory fear) goes away. I'll give you the links to 2 professionals who have used their knowledge (of speech production, biological responses, the impact of fear on the body) to teach themselves and many others to gain control over their speech. ​ [Understanding how Valsalva causes blocks\]([https://www.youtube.com/watch?v=1x4rlucELK0&t=43s](https://www.youtube.com/watch?v=1x4rlucELK0&t=43s)) [podcasts.apple.com/us/podcast/stuttering-solutions-atlanta/id1521144482](Tim Mackesesy - basically suggests that constantly, intentionally letting others know you stutter IS how you gain fluency)