Mistake #1: insinuating that psychology is a real science. At best, psychology is a "soft science," a term that "hard scientists" reluctantly give the psychologists in order to keep them from feeling completely inadequate.
Psychology is to real science as guessing is to real research.
Mistake #2: assuming anyone from Harvard would be a non liberal. There is something in the water at Cambridge that changes you, weakening the mind, and making you susceptible to liberalism. Maybe the water comes from the Charles River.....
-From a hard scientist.