With their joint work completed, the two turned their attention to studies on antisemitism and authoritarianism in collaboration with the Nevitt Sanford-led Public Opinion Study Group and the American Jewish Committee. In line with these studies, Adorno produced an analysis of the Californian radio preacher Martin Luther Thomas. Fascist propaganda of this sort, Adorno wrote, "simply takes people for what they are: genuine children of today's standardized mass culture who have been robbed to a great extent of their autonomy and spontaneity". The result of these labors, the 1950 study "The Authoritarian Personality", was pioneering in its combination of quantitative and qualitative methods of collecting and evaluating data as well as its development of the F-scale personality test.