Hi, Sorry to hear about your stuttering. It turns out that one of the earliest phenomenon studied in stuttering research was exactly what you experience: people who stutter are often much more fluent when alone. This has been documented over the past 80-90 years in multiple studies. But there was some variation in the residual level of stuttering when alone: some studies found near-perfect fluency when alone, while others found some residual stuttering. A recent, clever NYU study by Eric Jackson et al. (Journal of Fluency Disorders 2021) resolved this: they hypothesized that although the subjects in some studies were \*told\* that they were speaking alone, the subjects did not entirely \*believe\* that they were alone. Which is not entirely surprising, because in all of the studies, the researchers lied to the subjects, and all of the subjects' speech was recorded. Jackson et al. were simply better liars than the other researchers: they gave the subjects an intellectually challenging task, and then said that they were studying whether people who mutter to themselves perform better. Then the researchers recorded the subjects' mutterings-to-themselves. The result: something like 7 disfluent syllables out of about 100,000 total syllables. i.e. perfect fluency. IMHO, of the many weird aspects of stuttering, fluency-when-alone is the weirdest. Can you imagine what would be the reaction if people with cancer got better when alone, or if a mentally-ill person became stable when alone? Good luck on your fluency journey.