I am not a nurse, but I picked up this newsfeed feed on Google alert and joined just to respond. I am a speech-therapist and a person who stutters. I also do research in the cause and effective treatment of stuttering. What your supervisor is suggesting is unrealistic and, if that doens't get their attention, illegal under ADA. This unfortunately happens all the time. The previous poster is correct - stuttering is not caused by anxiety, but anxiety worsens stuttering. There's a lot a research to support that. If anxiety caused stuttering, stuttering would track more cleanly with populations diagnosed with clinical anxiety disorders. It sounds like you are close to being done, so you may have to make some decisions as to how much you want to rock the boat. Just know they cannot fail you legally because of a disability. If you'd like to speak further about this that would be fine - I can send my email if you'd like.