Anxiety disorders are a clusterfuck in themselves, and there is no consensus nor discovered solutions in how to control the automatic mental and physiological processes in anxiety disorders. Stuttering is even more complex and foreign than anxiety disorders are, so inserting it into the mix does nothing but produce vague generalizations as displayed here. If the authors believe in their hypothesis, let them solve anxiety first and then apply the solution to stuttering. If the shoe fits, their hypothesis proves correct. But they won't solve anxiety. The terminology has become lingo more than accurate technical representation of the underlying processes. And even if they did solve it, the shoe won't fit.