Study: Older Siblings Have Higher IQs
When you purchase through links on our site , we may earn an affiliate committee . Here ’s how it ferment . Being the honest-to-god child in the crime syndicate has its perks : later bedtimes , no hand - me - down , and , accord to a young sketch , a higher I.Q. . The study , detailed in the June 22 egress of the journalScience , analyzed the IQs of nearly 250,000 Norwegian 18- and 19 - year - older conscript and found that honest-to-goodness siblings had higher scores than young sib ....