As tempting as it is to put a young child in front of a TV for a moment of peace, resist the urge! Evidence is mounting on various developmental problems in babies caused by watching too much TV. Babies miss critical practice with language and reading emotions when they or their parents are distracted by TV.
Discover Magazine reports research by Dr. Dimitri Christakis, a University of Washington pediatrician, showing that "for every hour a television was turned on, babies heard 770 fewer words from an adult, the new study found. Conversational exchanges between baby and parent dropped 15%, as did the overall number of vocalizations made by children."
Babies brains are wired based on the input they receive. They need lots of loving attention to develop their language and social skills. These are the things a caring parent can provide but that a television does poorly at!