Babies spot math errors is the title. I was intrigued and went to read it.

Little babies, less than a year old, look longer at a display in which there were two puppets, one puppet is visibly removed, and- when a screen is removed- there are two puppets. (In comparison to when there is only one puppet left.)

I thought it was interesting but not insightful. Until I read the final sentence.

“This could be used as a test to ensure this ability is present in babies of this age.”

Is it my homeschooler you-don’t-need-to-test-my-child mentality or is that creepy?

What would be gained by knowing your child didn’t look at the second puppet? Maybe your child is a genius and knows it’s all a test and ignores it.