People who cannot communicate because of severe speech and physical impairments secondary to neurodegenerative disease may consider brain-computer interfaces (BCI) as an option for expression. Communication BCIs are not as accurate or fast as spoken language. The slow rate or inaccurate word choices might be a barrier to adoption. Understanding how potential end-users conceptualize this trade-off is critical for designing devices. This study examined the values that potential end-users ascribed to the speed-accuracy trade-off.