People use social networking sites like Facebook for various reasons, including the positive emotional experience that people enjoy and want to repeat, according to an article inCyberpsychology, Behaviour, and Social Networking, a peer-reviewed journal published by Mary Ann Liebert, Inc.
Measurements of physical and psychological responses such as breathing rate, brain activation, and pupil dilation, designed to assess a person's psychophysiological state, were collected in a group of individuals participating in either a relaxing or stressful task or being online on their own personal Facebook account. The results revealed a significantly different experience for stress or relaxation exposure compared to the response to Facebook.
Researchers report the design, findings, and conclusions of this study in the article entitled, "Why Is Facebook so Successful? Psychophysiological Measures Describe a Core Flow State while Using Facebook.”
(EurekAlert, February 2012)