Mander documents the devasting effects of TV on a community of Canadian Indians. The people became hooked on TV and neglected their traditional ways. They imitated the negative behaviour which they saw on the TV programs. To keep attention, the TV picture has to keep changing. Each change is called a technical event.
Some music videos have a technical event every second or more, which can only harm the brain.
TV takes away our inner space and our capacity to think. Teachers have noticed a drastic decline in the attention span of students. Like hard drugs, the more you get the more you want. The very nature of television is insidious. The constantly changing pictures capture the attention of the brain.