A few minutes of watching "SpongeBob SquarePants" in 4 year olds lowers attention and cognition.
A small, randomized, controlled study found that 4 year olds who watched fast-paced cartoons for only 9 minutes did significantly worse on tests of attention and cognition than those who spent the same amount of time drawing with crayons. How long do these effects last? More research is needed.
PositiveTip: Allowing your young children to watch fired-up cartoons may at least temporarily impair their attention and cognitive capacities.