August 7, 2008 presentation by Clifford Nass for the Stanford University Office of Science Outreach’s Summer Science Lecture Series. In this lecture, Clifford Nass describes how the human brain and body are "wired" for speech: The sound of a voice, whether from a person or machine, causes us to respond as we respond to actual people and to behave as we could in any social situation. In addition, Nass will discuss the speech interactions between humans and machines.