On October 12th, Mr. Aaron Marcus visited CrossWorlds and gave a talk on “Mobile Persuasion Design”. He presented his perspective and experience on the theories and practice of User Centered Design, Experience Design, the Science of Persuasion, and the merging of these developments in current and future applications for phones, tablets and wearables. Thereby, he gave insight in some of the work he performed during his long and successful career: Mr. Marcus is President of Aaron Marcus and Associates, Inc. (AM+A), in Berkeley, California, and an internationally known expert in Mobile User-Experience Design, Mobile Persuasion Design, Information Design, Visualization and Cross-Cultural Design. In a subsequent workshop, we presented our own projects to Mr. Marcus and got some very valuable feedback.