وضعیت تاهل و تولید مثل: ارتباط با هوش دوران کودکی و طبقه اجتماعی بزرگسالان در کودکان آبردین در مطالعه دهه 1950

In men, lower intelligence predicted having offspring (0.69; 0.59 to 0.81), while in women, higher occupational status was associated with lower odds of having children (0.66; 0.55 to 0.76). An interaction term showed that high intelligence women remained childless in the top occupational classes but, in the lower social groups, mothers were more intelligent than their childless peers. Intelligence or occupational status were not associated with the number of offspring in both sexes.