>>11141946Here's some extra information,
Parents who have extremely stressful situations in their life BEFORE having children will impart upon the child that will cause the child to have difficulty with stress in their life. A mother who has severe stress while pregnant will also impart this, but it will be more profound and the child may become socially stunted. A child that experiences great stress while growing up will also have this problem. Yes, in the latter, circumcision also produces this result. Each can be a spectrum of result and if more than one are added together the results also stack.
FYI, you should have noticed that in
>>11138127 "IQ" was not mentioned. This is because you can not quantify intelligence in a meaningful way. Psychology just isn't enough of a science to be able to do that yet because there is so much that is not understood and the number of variables are too vast for single studies or tests to give reproducible results.