Some online dating sites promise to find your soul-mate by using sophisticated matching algorithms. But a new study by social psychologists says they don't work. We discuss the science of relationships. Can we make accurate predictions about love? How do you use online dating sites? Has it worked for you?

Guests:

Eli Finkel , associate professor of social psychology at Northwestern University

Thomas Lewis , assistant clinical professor of psychiatry at UCSF and co-author of "A General Theory of Love," which explains the psychobiology of emotion and human relationships

Pepper Schwartz , professor of sociology at the University of Washington, chief relationship expert at PerfectMatch.com and developer of the algorithm they use to match potential couples