You’ve probably experienced an elevation in your mood when in the presence of someone upbeat, or starting to feel more negative when around someone angry. There’s good science that explains this phenomenon, along with a few other ways that you’re subconsciously influenced by those around you. In Angry/Negative People Can Be Bad for Your Brain, Kathy Sierra explores these ideas in an easy-to-grasp way. There are important implications here for negotiating and reducing conflict, and I highly recommend this article.