See the entire definition of Backbone. Biopsy: The removal of a sample of tissue for examination under a microscope to check for ... Blood clots: Blood that has been converted from a liquid to a solid state. Also called a t... Bone scan: A nuclear medicine technique for creating images of bones on a computer screen ...
Schmidt's study also stopped following the toddlers at age 3; she acknowledges that some cognitive changes may not occur until children are a few years older. TV exposure in babies younger than 2 doesn't do any good, Schmidt and Christakis agree.
Nielsen also says gaming consoles are becoming a bigger video medium, though the numbers remain small. As in years past, we watch more TV as we get older. Children 2-11 watch an average of 24 hours of TV a week, or 31/2 hours a day. That number dips to 22 hours for teens, ages 12-17, then goes back up to 25 for 18-24s. After that it rises steadily until people over 65 average 48 hours a week, or nearly seven hours a day. That last fact proves that at least someone â Nielsen â still counts older viewers, even if the broadcast networks would rather not.