Updated 10:52 a.m., 11:33 a.m., 11:53 a.m., 12:11 p.m., and 4 p.m. May be updated further.
Virginia Johnson, one half of the famed Masters and Johnson research team on human sexual behavior, has died at the age of 88, her son Scott tells St. Louis Public Radio.
Johnson was a resident of The Altenheim senior living community in St. Louis. The facility has also confirmed her death.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.