In this paper the possibility of an existing bias, due to the order (here by the initial letters of the family names) in which the results of the students are judged, was studied. This would constitute of a dynamic rater effect of harshness, or leniency, toward the performance of these students due to rater fatigue. A substantial dataset, consisting of 12 years of written exams, for a course, for 2512 examinees, was mined and the results analyzed. The evidence point to the fact that the assessment procedure does not favor, or disfavor, students with family names having initial letters placed late in the alphabet.