People don’t want to believe that how intelligent they are can be predetermined. Otherwise, it will only be necessary to do as well as it is said one is capable of performing. Sibling rivalry especially makes the topic of intelligence a very sensitive subject. Now, studies are being done on boys to test their IQ in relation to their birth order. They have found that boys who are the first born or have gained the rank of the oldest boy because of the death of an older sibling are said to score higher on IQ tests than their younger brothers.

In Norway, researchers have found that it isn’t a matter of being born first but merely growing up as the oldest child that results in higher IQ scores. The older child benefits from having to organize and express thoughts in order to tutor their younger brothers both academically and in real life situations. The younger children, especially the youngest, do not have this opportunity which gives the oldest brother the advantage.

Norway’s National Institute of Occupational Health studied the IQ test results of 241,310 Norwegian men drafted into the armed forces between 1967 and 1976 where were between the ages of 18 and 19 at the time. They found that the average IQ of first born men was 103.2, second born men was 101.2 unless their older sibling died in infancy. Then their scores rose to 102.9. Third born sons averaged 100, but if both older siblings died young, their score rose to 102.6. These differences are subtle, but they are distinct enough to show that the researcher’s findings may be correct.


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