Robert Cialdini is a leading researcher in the field of persuasion. He authored the book Influence in which he outlines 6 key principles of persuasion and anecdotes to demonstrate each. The 6 key principles that Cialdini identified are reciprocity, scarcity, authority, consistency, liking, and consensus. Read Cialdinis official (or watch the video version) to get more details on each of these principles.
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Respond to the following prompts:
Provide one example of a commercial or marketing technique that uses one of these persuasion principles.
Identify which principle is used.