Table 3.

Hypothetical vignettes and prompts presented to interview cohort

Hypothetical vignettes (summary)	Interview prompts (examples)
An individual with Parkinson’s disease considers providing BCI researchers with a collection of personal letters she has written to her daughter over many years.	What do you think about personalizing a BCI device and its effect on the relationship of a device user and those important to them?
An individual with stroke-related communication impairment considers providing BCI researchers with YouTube videos he made earlier in his life, including ones that involved crass and violent language.	How can the words a person used during an early phase of life connect with how a person views themselves now?
An individual with ALS considers providing BCI researchers with recordings of her comedy shows, an area of her life of which her family is unaware.	What do you think about one’s ability to use technology to paint a picture about who one is or wants to be?
An individual with advanced multiple sclerosis considers providing BCI researchers with personal emails, including ones that involve her romantic history.	What do you think about the ability of technology to reveal things that people don’t even know about themselves?
Individual with ALS considers providing BCI researchers with work-related emails in which her way of speaking differs from how she speaks with friends and family.	How might a person try to change how others view them by choosing different types of words?
Spouse of individual with locked-in syndrome from late-stage ALS considers providing BCI researchers with her partner’s personal diary.	What role should those people important to the person using a BCI play in collecting language sources to improve performance?