Attribution theory was applied to help predict the results of an experiment that examined the effects of three independent variables on students' ratings of their professors. The dependent variables were students' perceptions of whether the professor caused the students' grades and student satisfaction with their professor. The results suggest that when students expected "D"s, many of those students were likely to believe that their professor was the cause of why students received "D"s. Conversely, when students expected to receive "A"s fewer students were likely to believe that the professor caused students' grades. This finding is consistent with the prediction of attribution theory. Another finding was that students were more satisfied with a caring professor who gave the students "D"s than they were with an uncaring professor who gave students "A"s. Additionally, the results indicated that there was an interaction effect of students' grades and the caring of the professor on student satisfaction with the professor.