Which Robot Am I Thinking About?

In three studies we found further evidence for a previously discovered Human-Robot (HR) asymmetry in moral judgments: that people blame robots more for inaction than action in a moral dilemma but blame humans more for action than inaction in the identical dilemma (where inaction allows four persons to die and action sacrifices one to save the four). Importantly, we found that people’s representation of the “robot” making these moral decisions appears to be one of a mechanical robot. For when we manipulated the pictorial display of a verbally described robot, people showed the HR asymmetry only when making judgments about a mechanicallooking robot, not a humanoid robot. This is the first demonstration that robot appearance affects people’s moral judgments about robots. Keywords—robot ethics; machine morality; humanrobot interaction; moral psychology; anthropomorphism.