It’s one of those bits of research that’s difficult to take seriously, but I have a theory why there might be some truth to this. Many guys treat their bride like she’s less than intelligent. Frankly some treat their bride as if she’s an idiot. Similarly, many women seem to feel bad about their intelligence, especially compared to their guy. However, if she is without a doubt smarter, then there will be no putting down of her brainpower by either of them, and that should make for a better marriage.
The lesson here, I think, is that we need to build our brides up, and make sure they know we appreciate their minds as much as we appreciate their bodies. The next time she says or does something smart, make a bit more of a big deal out of it that you have in the past. I’d also look at the way you treat her – saying she is smart is worthless if you treat her as if she’s stupid.