The thinking pattern of a block is often this - I'm afraid I'm going to have a repetition so I'll just shove/speed through this word so it doesn't happen." This causes the block. ​ I know you have seen my suggestions before on how to reduce blocking. Have you listened to the podcast I recommended? For many, standard stress reduction strategies are unhelpful in the moment of a block. The prompt to "take a breath" often results in the person taking a chest breath, which further increases anxiety, as opposed to a diaphragm breath, which is calming. I point this out because it can be very disheartening if you try calming strategies, yet still have just as much trouble speaking.