The authors reported the differences among the groups in math, reading, and vocabulary test scores at age six. Their results suggest that watching more TV under the age of three lowers test scores; not a huge amount, but by the equivalent of a couple of IQ points. If you are looking in this data for evidence that TV is bad, which is what the authors argue, high watching before age three seems to be an issue. However, watching TV at older ages doesn’t seem to matter. When the authors compared, say, the kids who watched only a little TV before age three and then a lot between ages three and five
...more
