baby sitter test
n.— «The software design owes an obvious debt to the TiVo’s famous attention to detail. In fact, the MovieBeam service is so easy to use, it easily passes what home-theater aficionados call the Baby Sitter Test.» —“Renting Movies With a Box and a Beam” by David Pogue New York Times June 1, 2006. (source: Double-Tongued Dictionary)