  Human-robot interaction exerts influence towards the human, which often
changes behavior. This article explores an externality of this changed behavior
- preference change. It expands on previous work on preference change in AI
systems. Specifically, this article will explore how a robot's adaptive
behavior, personalized to the user, can exert influence through social
interactions, that in turn change a user's preference. It argues that the risk
of this is high given a robot's unique ability to influence behavior compared
to other pervasive technologies. Persuasive Robotics thus runs the risk of
being manipulative.
