A psychologist at Harvard Medical School has heatedly criticized Sesame Workshop for producing a DVD aimed at babies and toddlers aged 6 months to 2 years. In an interview with today's (Tuesday) Washington Post, Susan Linn, who is also founder of the Campaign for a Commercial-Free Childhood, called the DVD "a betrayal of babies and families" and added, "There is no evidence that media is beneficial for babies, and they are starting to find evidence that it may be harmful. Until we know for sure, we shouldn't risk putting them in front of the television." But Rosemarie Truglio of Sesame Workshop, which produced the DVD with the child-development group Zero to Three, insisted that the Workshop, which also is responsible for PBS's Sesame Street, "did a lot of research and preparation" for the video." However, Zero to Three cofounder T. Berry Brazelton is lending his name to the opposition, urging that "children under two be kept away from screen media. It's too expensive for them physically as well as psychologically," he said.