Christian End is, arguably, the most quoted professor on campus. The associate professor of psychology is an expert in understanding the behavior of sports fans, who sometimes seem to defy logic but leave him with an unending source of examples for his research. When the media look for an explanation, they call End. Beginning this summer, he’s also expanding his media coverage. The editors at Psychology Today, the leading journal devoted to understanding what people do and why they do it, asked him to write a monthly blog on sports psychology for its website. His first post is now at psychologytoday.com.