This document discusses a neuroscience experiment that explores consumer reactions to various content types, particularly focusing on earned media's effectiveness compared to traditional advertising. The study conducted by MSL and Spark Neuro highlights how earned content units (ECUs) significantly outperform digital banner ads in terms of cognitive attention, emotional engagement, and purchase intent. By using advanced neuroscience methods, it establishes that earned media is more influential in enhancing brand affinity and driving sales, supporting the growing role of PR in marketing strategies.