It could be even more confusing if you have multiple robots in the same space—which one is trying to get your attention? There’s also a psychological effect that differentiates humanoids from other kinds of robots, says Prather. These issues are especially problematic when robots are intended to perform roles involving emotional labor or support for vulnerable people. There may also need to be some different standards for robots that operate in different environments, says Prather. With some general ground rules in place, however, the public should ultimately be able to understand what robots are doing wherever they encounter them.