 A 2011 study conducted at the University of Virginia and published in the journal Pediatrics suggested that allowing preschool-aged audiences to watch the series caused short-term disruptions in mental function and attention span due to frequent shot changes. A Nickelodeon executive responded in an interview that the series was not intended for an audience of that age and that the study used "questionable methodology and could not possibly provide the basis for any valid findings that parents could trust".
