I agree with much of what you have detailed, especially that stuttering is exacerbated by anxiety linked to lack of control. However I think it is important to remember that the underlying aetiology of stammering isn't universal. People who's stutter began due to a casual event, such as childhood development may find that targeting their lack of control and preemptive anxiety useful. Especially as these individuals may experience more of the 'critical self imposing demands' you detailed. However, individuals with genetic causes, such as mutated GlcNAc-1-PTase genes (1), will likely experience blocks and disfluency regardless of if they're feeling in control or not. So perhaps this line of thinking is less useful for them, and may be frustrating to hear the idea of self enhanced stuttering. Your posts are always very interesting btw, I like to see scientific thinking on here as a geneticist! (1) PMID: 22884963