"Persuasive technology is broadly defined as a technology that is designed to change attitudes or behaviors of the users through persuasion and social influence , but not through coercion ( Fogg 2002). Such technologies are regularly used in sales , diplomacy , politics , religion , military training , public health , and management , and may potentially be used in any area of human-human or human-computer interaction. Most self-identified persuasive technology research focuses on interactive, computational technologies, including desktop computers, Internet services, video games, and mobile devices ( Oinas-Kukkonen et al. 2008 ), but this incorporates and builds on the results and methods of experimental psychology , rhetoric ( Bogost 2007 ), human-computer interaction , and design with intent."
(Quote from Wikipedia)
Examples of persuasive technology include for instance websites whose aim it is to help people quit smoking or lose weight, simulation games that, via the way the simulation is implemented, may change attitudes, information visualization making people aware of new information which might change thier behavior or attitude, warning systems in cars, gym accessories like bikes with digital tracks or trips... It's everywhere.
PS: And don't confuse persuasive and pervasive! Pervasive is something that "is always there", e. g. World of Warcraft is a pervasive game because even if you log out, the game world still exists, and others carry on playing.
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