[paintbox]

Just because it's obvious doesn't mean it's not worth investigating.

And there are many people who believe that children under 7 can't truly reason, so it's not even as obvious as it seems.

[iambateman]

I agree that it's worth investigating...I was just expecting more detailed analysis from an academic paper. The story linked basically says "3-5 year-olds can classify stuff into groups."

For what it's worth, I have a 2- and 5-year-old, so I'd love to know more about how their brains are developing.