For robots to be successfully deployed in real-world environments, humans should trust them enough to cooperate with them. Some roboticists have been trying to determine whether users perceive robots that exhibit socially expressive behaviors, such as gestures, eye contact and nodding, as more trustworthy.For robots to be successfully deployed in real-world environments, humans should trust them enough to cooperate with them. Some roboticists have been trying to determine whether users perceive robots that exhibit socially expressive behaviors, such as gestures, eye contact and nodding, as more trustworthy.[#item_full_content]