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I only recently came across the field of research known as captology, where the psychological principles of persuasion is combined with computer technology. Assuming that user experience design already involves a significant amount of study in psychology and user behaviour, how much more does this field really add to UX in general, and has the been any specific projects that you have worked on where you have taken these concepts into consideration?

Some links on this topic if you are interested: http://captology.stanford.edu/ http://www.persuasionapi.com/

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BJ Fogg and his group focuses on behavior design. Their practices are quite well within the scope of UX and he organizes regular workshops to teach UX folks about Behavior design. I have worked on a couple healthcare projects where we have used some of his work - The Fogg model. –  rk. Jul 16 '13 at 1:28
Is this generally applied to the information architecture, user interface design, interaction design or all three? I will have to look into this in more detail. –  Michael Lai Jul 16 '13 at 2:11
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There's Human Factors International methodology of persuasive design called PET design™, which stands for Persuasion, Emotion and Trust, rooted in social psychology, and based on Fogg, Caldini, Weinschenk and other researchers. As HFI certified user experience analyst I've used this methodology in practice. Please, check some links on this topic:

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