I know that for every report of a piece of scientific research there is a contradiction waiting to be published, but these results do look pretty convincing. Maybe Teletubbies and In the Night Garden should carry this health warning:
Television affects, among other things, the development of sustained attention, something that is crucial for learning. A report from the American Academy of Pediatrics' journal found that children who watch television between the ages of one and three had a significantly increased risk of developing ADHD-type attention problems by the age of seven.
Moreover, TV viewing between the ages of five and 11 has been linked with short attention span, poor concentration, and being easily distracted later in adolescence.Of course the solution could be simpler - Bring Back Bagpuss!