Quote:
The difference in the scores (103.2 vs. 101.2 vs. 100 for the third-borns) is so tiny, it hardly matters. An even 100 is average. 112 is the next standard deviation up, meaning that the distance is statistically significant from 100. So basically anyone within the 100 to 111 range is considered an average IQ and more or less equal to one another as the scores can change within a range of points each time a person takes the test.
However when you have a large study population you should always get an average IQ of 100, as they did with third-borns here. Any statistically significant difference in IQ from the average of 100 does mean something. The fact that the research shows a consistent though very tiny difference tells me that first-born children are probably getting something extra, maybe it is their parents' time or attention, maybe they are talked to more, maybe it is all the brand-new toys. It seems we kinda already knew that firsts and onlies had a few advantages in those areas...[/b]
|
TO the bolded: Really? LOL, not the case for me! The baby got all of the attention, followed by the only boy, and then...me! HAHA!