This is a GREAT INFOGRAPHIC that explains the psychology of Social Marketing…
When you combine the power of the mind and the force of social shopping, you have a mighty confabulation of social rules and subconscious needs. Together, these things play into the psychology of social commerce. Psychologists have defined six universal heuristics or learning methods that have been seen in shoppers and are now being seen in social commerce.
Go to http://www.tabjuice.com/infographics/social-commerce-psychology-infographic/ and check this out in more detail.
Social Commerce Psychology,