  There is an increasing interest in considering, implementing, and measuring
trust in human-robot interaction (HRI). Typically, this centres on influencing
user trust within the framing of HRI as a dyadic interaction between robot and
user. We propose this misses a key complexity: a robot's trustworthiness may
also be contingent on the user's relationship with, and opinion of, the
individual or organisation deploying the robot. Our new HRI triad model (User,
Robot, Deployer), offers novel predictions for considering and measuring trust
more completely.
