Genetic relationship to Mother
mother-and-child-genetic-correlation
The correlation between the IQs of parents and children is .35; between identical twins, it’s .86. - introduction-to-psychology-gateways-to-mind-and-behavior-e13
An interesting example of some typical correlations is provided by a study that compared the IQs of adopted children with the IQs of their biological mothers. At age 4, the children’s IQs correlated .28 with their biological mothers’ IQs. By age 7, the correlation was .35. And by age 13, it had grown to .38. Over time, the IQs of adopted children become more similar to the IQs of their biological mothers. - introduction-to-psychology-gateways-to-mind-and-behavior-e13
adopted child age corelation coefficient with biological mother 4 0.28 7 0.35 13 0.38 Related
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Number of words heard during initial development
Charlie-Kirk has stated that number of words child hears in first 18months has strong correlation to later IQ levels. (Tying it to whether a dad is present or not as that changes number of words child hears). - unverified