Korva Coleman speaks with Kathleen Hall Jamieson, Dean of the nnenberg School for Communication, about a new study on children's television iewing habits. 6:54 . ANSWERING MACHINES: Korva Coleman speaks with Peter Crabb, professor of sychology at Pennsylvania State University in Philadelphia. He's just published study in the Journal of Social Behavior and Personality on the way answering achines have changed the way we interact. The answering machine was patented 25 ears ago this year.
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