Examining educational aspirations and expectations of black and white youths in segregated and desegregated public schools, the study collected data from a panel of high school sophomores in 1966, seniors in 1968, and 4 years after high school in 1972, in 3 Texas counties selected for a high rural residence and a high black population. In 1966 the 3 counties contained 13 segregated black high schools, 9 segregated white high schools and 1 desegregated high school. In 1968 there were only 3 white schools and 5 black schools still segregated. The design of the research was characterized as an accidental quasi-experiment because several but not all the conditions necessary for rigorous field experimentation were present. The major finding was that the desegregation experience in the youth panel had a negligible effect on the formation of measured mobility-linked attitudes. (PS)