Well, I thought both my parents were pretty smart, so I couldn't lose either way in that regard. (Of course, one might argue how would **I** know?)
My sons' mother was pretty smart, and I still want to believe maybe me. Both of those boys tested out early in their lives as geniuses. As did I when young, one of those "child prodigies" who got written up in the papers in the 1950s. My Mother always kept the newspaper clipping under the glass of her dressing table, I was pictured at only 6.
But then I suffered accidental head traumas and I wasn't so bright anymore, some maintain even half-witted. Never got it back, obviously. Made me a very successful Army Officer, though, so there does exist a career path for dim-wits.
But one day I went to pick up my youngest son from 1st grade. All the other kids had already left. And his teacher sat me down, while my son was occupied doing something.
"I want to thank you," she said. Thank me for what? What have I done?
"Thank you for ******." (My son's name) Huh?
She went on to tell me that she had taught elementary school for 30 years, and was retiring at the end of that term. And that she had always hoped to have a child genius in her classroom, just once. An odd wish, I thought, but OK.
And my son was that genius. She'd never in 30 years known a child as smart & quick-witted as him (well, the quick-witted I already knew, along with a wickedly sophisticated sense of humor, way beyond his years).
But she went on to say that what also made him special was that he didn't act like a nerdy genius type, withdrawn from the other kids. Rather, he was a natural leader. He actually spoke out and took control of the class when the others got unruly. She'd never seen that before in a 1st-grader to the degree he displayed it.
And the other children listened to him and obeyed him. Not because of any threat of physical force, but with the sheer force of a commanding personality. Some people just naturally have that, although at age 6 it's a little remarkable.
I wanted to vainly think he picked up those leadership traits indirectly from his Dad, and maybe his smarts, too. And his older brother was frighteningly intelligent for his age, as well, who could be the subject of other similar stories. Their Mother & I, she having been an elementary school teacher herself, did everything we could to provide them with mental stimulation & growth opportunities.
But never strictly controlling them, kids wither under that. Merely providing them a rich learning environment in which they could develop on their own. Go in the directions they chose for themselves. You guide children, but direct them as little as possible. Just like they miraculously learn language all on their own, if you expose them to the correct material their young brains are like sponges.
And the information you provide is the water. You just need to monitor & guide, answer questions and supply that "water", but strongly direct only when absolutely necessary. It seemed to work quite well with our sons.
But now your "study" is claiming that I had little or nothing to do with them being inherently intelligent. And I had always wanted to take some of the credit for them (or blame, especially for the younger boy's mischievous, almost subversive sense of humor).
Well, if their Mother is the sole reason, or me, or both of us equally, or just random genetic good luck, I'm happy for them. They are what they are, however it happened, and that's all that matters.