Onsale knows competition is a strong motivator. B. Lots of people use Onsale Onsale posts how many people have used their site, which gives Onsale more credibility. At last count over 6 million people had registered. C. Onsale implies you can start immediately The Onsale interface implies you can dive right into the action. However, when you click to enter a bid, you'll find you must register first.
People feel obligated to return favors, no matter how small.
People are influenced by others' attitudes and actions. Sources perceived as authorities are more persuasive. The rarer something seems to be, the more people want it. We find that many principles from Cialdini's book can apply to persuasive technologies. This group's purpose is to investigate how interactive technology can persuade people or groups to adopt environmentally friendly attitudes and behaviors.