Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Presence is a theoretical concept describing the effect that people experience when they interact with a computer-mediated or computer-generated environment (Sheridan, 1994). Lombard and Ditton (1997) described presence as “an illusion that a mediated experience is not mediated” (Abstract). They explained that the conceptualization of presence borrows from multiple fields including communication, computer science, psychology, science, engineering, philosophy, and the arts. And a variety of computer applications and Web-based entertainment depend on the phenomenon to give people the sense of, as Sheridan called it, “being there” (p. 1). The word “presence” is derived from the term “telepresence,” which was coined by Massachusetts Institute of Technology professor Marvin Minsky in 1980 (Steuer, 1993). His research explained telepresence as the manipulation of objects in the real world through remote access technology (Minsky, 1980).

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