The linear pattern of altruism

Referring to study by Tankersley, Stowe and Huettel, Nature Neuroscience, 21 January 2007, “Scientists say they have found the part of the brain that predicts whether a person will be selfish or an altruist.”, BBC. “People may not perform selfless acts just for an emotional reward … Instead, they may do good because they're acutely tuned into the needs and actions of others.” Forbes.