A student wrote an essay about the effects of television on children. At one point, she argued that, because every story on television is presented with already determined images, television "leaves no room for one's imagination."
This is a point I have heard before (mostly with respect to differences between books and movies), but I have never quite believed it. The idea seems to be that when you read, you spontaneously generate images in your head, and that such spontaneous image generation is what imagination is. But surely imagination is much more than just image generation!
Miles and Luisa (and I) have been getting into "Shaun the Sheep." They often start acting out scenes from their favorite episodes. Isn't that imagination, too? (For clips of Shaun, go here.)