What does it take to create a happy marriage? There are so many different parts that work in unison to keep a good relationship hum. We all know the big ones: Love. Trust. Hard work. Commitment. Understanding. A good sense of humor. However, a new paper by researchers at the University of Rochester that was published in the Journal of Contextual Behavioral Science reviewed 174 different studies and found that all happy marriages have one big trait in common: Psychological flexibility.

Great. But, what exactly, is psychological flexibility?