Parents hoping to raise baby Einsteins by using infant educational videos are actually creating baby Homer Simpsons, according to a new study released today.

For every hour a day that babies 8 to 16 months old were shown such popular series as "Brainy Baby" or "Baby Einstein," they knew six to eight fewer words than other children, the study found.

Parents aiming to put their babies on the fast track, even if they are still working on walking, each year buy hundreds of millions of dollars' worth of the videos.

Christakis said children whose parents read to them or told them stories had larger vocabularies.

"I would rather babies watch 'American Idol' than these videos," Christakis said, explaining that there is at least a chance their parents would watch with them — which does have developmental benefits.