Exactly! From my understanding dopamine antagonists can improve stuttering by skipping/ignoring the evaluatoin process. So.. what I mean by that is.. let's for example consider that a stutterer does not stutter when he's speaking alone. But if we add a person, then conditioned stimuli become present (which the stutterer then responds to subconsciously most likely without him realizing it and without him being aware of any of this conditioning process).. in other words, this implies that: If he speaks alone and speaks fluently, then the "evaluation process of feared words, feared situations, stutter pressure etc" is resolved.. so even if a stutterer feels and experiences a feared word when he's alone (for an example). Then he still doesn't stutter due to the evaluatoin process being reduced - when he's alone. For example, normally stutterers evaluate e.g., a feared word and evaluates fear of validation or judgements. But if this evaluation process is skipped in the brain forcefully (by drugs) then stuttering is reduced, at least that's what I've read in research so the approach-avoidance conflict is much reduced in this way, and stuttering is reduced. According to research, such drugs doesn't work for all types of stutter disorders though (there are different types of stuttering, or different subtypes, or different ways that we handle stuttering or handle stimuli that lead to stuttering)