Let's say you're getting a robot butler. (Congratulations on your purchase, future-dweller!) You can choose between three models for your new Jetsons-style Rosie robot: a clearly robotic machine, maybe even a cutesy one, like Wall-E; a more humanoid, personish 'bot, like the android from Metropolis; or a robot that looks just like a real human being. Which do you pick?

A new study from Georgia Institute of Technology's Akanksha Prakash and Wendy A. Rogers answered that question for you. And the answer is: Well, it depends.