  The rapid development of AI-mediated communication technologies (AICTs),
which are digital tools that use AI to augment interpersonal messages, has
raised concerns about the future of interpersonal trust and prompted
discussions about disclosure and uptake. This paper contributes to this
discussion by assessing perceptions about the acceptability and use of open and
secret AICTs for oneself and others. In two studies with representative samples
(UK: N=477, US: N=765), we found that secret AICT use is deemed less acceptable
than open AICT use, people tend to overestimate others' AICT use, and people
expect others to use AICTs irresponsibly. Thus, we raise concerns about the
potential for misperceptions and different expectations for others to drive
self-fulfilling pessimistic outlooks about AI-mediated communication.

Human-Computer Interaction;Artificial Intelligence;Computers and Society