henry copeland:

Why humans find faulty robots more likeable: New social robotics research finds that humans prefer interacting with faulty robots significantly more than with robots that function and behave flawlessly -- ScienceDaily

By means of video coding, the researchers could replicate their findings from earlier studies and show that humans respond to faulty robot behavior with social signals. Through interviews and user ratings, the research team found that somewhat surprisingly, erroneous robots were not perceived as significantly less intelligent or anthropomorphic compared to perfectly performing robots. Instead, although the humans recognized the faulty robot's mistakes, they actually rated it as more likeable than its perfectly performing counterpart.
- www.sciencedaily.com