Are Firstborns Smarter?

I read the following article recently.

Firstborns found to have higher intelligence - A study of 240,000 Norwegian men says eldest children have IQs 2 to 3 points greater than younger siblings'. Wading into an age-old debate, researchers have found that firstborn children are smarter than their siblings — and the reason is not genetics, but the way their parents treat them, according to a study published today. The complete article can be viewed at latimes.com

Thats very interesting indeed. I'm not sure how true the research is but one thing is true. Its true that we do treat the firstborn differently. Not because we love the secondborn less but because of time constraints. We try our best but somehow the firstborn had more attention from us than the second in terms of everything.

She had more attention from us in watching out for her developmental firsts. She had more attention in reading to and with her, playing with and teaching her. We try out best with the secondborn but somehow time always got in the way.

Hmmm.. this reminds me to pay more attention to the second and teach him more.