Still, most of those effects occur in the context of harmless play and it is patently obvious that children are not normally turned into aggressive little monsters by TV or video games, since most children do not become aggressive little monsters.
It seems inevitable that the magic of the written word will fade.
Although we love the idea of choice - our culture almost worships it - we seek refuge in the familiar and the comfortable.
A strangely reflective, even melancholy day. Is that because, unlike our cousins in the northern hemisphere, Easter is not associated with the energy and vitality of spring but with the more subdued spirit of autumn?
Some researchers sensibly suggest that rather than worrying too much about which programs our children are watching, we should concentrate on trying to reduce the total amount of time they spend in front of the screen.
Is it possible that literacy standards are falling because young Australians are growing up in a culture in which they can be entertained and informed, and in which they can communicate effectively, without having to master any but the most rudimentary literacy skills?