Combining insights from psychology, behavioral economics and neuroscience, University of Oregon researchers have found converging signs of pure altruism and behavior that increase with age in the brain. People give to charity for numerous non-altruistic reasons, such as showing off their generosity to others. To isolate pure altruism from other motivations, researchers triangulated methods from the three fields. Their goal was to find a sweet spot where altruism is done for the simple joy of…