In my family there are 3 girls.2 of us are very good at mathematics and 1 is awful. This means that Mum was only positive in 2 pregnancies and didn't give a damn in the third!!!!
I'm....??! What a stupid study, it's totally meaningless. They didn't control for, among other things: " We did not allow for concurrent social circumstances as we wished to concentrate on factors that could be changed for mothers to become less external and more internal." https://www.frontiersin.org/articles/10.3389/fpsyg.2019.00194/full Have lots of data on things like diet, library/books etc - that accounts for most of the differences. A lack of "locus of control" here would very likely be linked to poor economical situation, family support etc. But lets focus on "personality"
Mothers get the blame again! Way to make expectant mums paranoid! “But you MUST think positively, my dear or the baby will never be able to do his sums.” As the rent man bangs on the door, the credit card bill comes in, and she throws up again due to morning sickness. Yeah, that research is “really” gonna help her.
Well, the authors' mothers did a poor job during pregnancy at expecting them to be logical and rigourous ...
An almost total lack of questionnaires submitted, correctly filled in, by said feteuses would suggest that the correlation works the way they suggest. Maybe. In some imaginary place where psychologists may be from.
Is there something in the water? Between NHS diagnosis errors ( nurse with cervical cancer,) , Oliver MaGowan' s death due to administering a drug staff were told not to administer, CFS resesrch generally from this location , and now this ? It' s as if this area exists in some parallel universe...