I think far more important than one's IQ is one's EQ, that is, one's emotional quotient.
My brother in law, who holds a Bachelors in Psychology, a Masters in Human Resources, an MBA and is HR Director for a sizable hospital in Cincy, has problems with pushing and grabbing his wife when arguing - assault.
I don't find that to be very intelligent at all.

A close friend who holds Bachelors and MFA, who teaches at university, is terribly depressed and can't shake a couple of "vices" - drug abuse.

These are intelligent people yet exhibit dysfunctional behaviors.

Is there a correlation?

__________________
"Where the telescope ends, the microscope begins. Which of the two has the greater view?" - Hugo

"Men occasionally stumble over the truth, but most pick themselves up and hurry off as if nothing had happened." - Churchill