Hi Icy-Pilot-7495, yours is an interesting observation. I did a little survey of Reddit users on this very subject (see my post of about 2 months ago), i.e. are PWS actually fluent when alone? The motivation for this survey was a 2021 paper in the Journal of Fluency Disorders by a Prof. Eric Jackson (NYU), who concocted a scheme that he called 'private speech' (which was just muttering to oneself) that convinced his research subjects that they were truly alone. His striking finding was that all of his 21 or 24 subjects were fully fluent when they really believed they were alone. But my survey wasn't so clear. Yes, most people reported good fluency when alone, and all were more fluent when alone than when conversing in-person, but some reported less-than-perfect fluency when alone. I don't understand the reason for this difference. BTW, have you ever tried the online speech-to-text apps that convert your speech into text? I got interested in this topic about 26 years ago when I injured my hand and could not type, so I tried Dragon Naturally Speaking (not free!). I was surprised to see how accurate the transcription was, even back then, but also how much more fluent I was talking to a computer than to other people. Good luck to you in your fluency journal.