Attrition is an important issue in higher education, especially in the field of computer science (CS). Here, we investigate to what extent an education reform affects the attrition of students by analyzing the pattern of grades of CS students’ academic achievement from 2010 to 2018 by IRT, based on Rasch-model analysis. We analyze data from 3673 undergraduate students of a large public university. In 2016 an education reform—as an intervention—was added to our BSc program: all theoretical lectures became compulsory to attend and we introduced a learning methodology course for all first-year students. According to our results, after the education reform most subjects became accomplishable, and students with lower levels of ability also tried to take exams. We succeeded in retaining 28% of our students. Analyzing students’ results could help administrators develop new programs in order to increase retention.

减员是高等教育中的一个重要问题，尤其是在计算机科学（CS）领域。在这里，我们根据Rasch模型分析，通过IRT分析了2010年至2018年CS学生的学术成绩等级模式，从而研究了教育改革在多大程度上影响了学生的减员。我们分析了来自大型公立大学3673名本科生的数据。2016年，作为一项干预措施，我们将教育改革（作为一种干预措施）添加到了BSc计划中：所有理论讲座都必须参加，我们为所有一年级学生开设了学习方法课程。根据我们的结果，在教育改革之后，大多数科目都可以完成，而能力较低的学生也尝试参加考试。我们成功地保留了28％的学生。