I've been doing research on the effect of media. Here a couple of relevant facts....
Since our children sit passively while the television dances, their ability to become deeply involved with books, school teachers, and other less frenetic sources of wisdom -- their ability to think -- atrophies.
Brazelton hooked newborn babies up to electroencephalographs and then exposed them to a flickering light source similar to a television but with no images. Fifteen minutes into their exposure, the babies stopped crying and produced sleep patterns on the EEG, even though their eyes were still open and observing the light.86 Brazelton's experiment revealed that the medium itself, with no content, acts directly on the brain to suppress mental activity. The Group for the Advancement of Psychiatry confirmed Brazelton's finding in 1982. They reported that the brain waves generated while watching even the most exciting shows were those of low attention states. The researchers found that while subjects viewed television, "output of alpha rhythms increased, indicating they were in a passive state, as if they were just sitting in the dark."87 Every activity a child engages in during his busy day refines some set of skills. Reading is practice; writing is practice; sports is practice; engaging in fantasy games is practice; and interacting with people is practice. All these activities in some way help prepare a child for the challenges of adult life. Television is also practice, but not for any activity. Television is practice for inactivity. When children watch television they are practicing sleeping - often for hours every day. One does not need a Ph.D. to realize that this could have all sorts of deleterious effects on cognitive development and later aspirations.
That study is just as smart as taking a blind man to an art museum and asking him which picture he likes most.