Stephen Anderson is the first person we think of when it comes to these kinds of interactions. Stephen is an independent consultant and creator of the Mental Notes, a set of reference cards with design insights from the world of psychology.
Stephen is one of the most popular speakers at the Web App Masters Tour and we want to share a sample of his talk, Designing Seductive Business Apps. In this portion of his talk, he presents three concepts: Scarcity, Set Completion and the Feedback Loop.