Other studies focused on the impact of online formative assessment on the learning process and its results. The study by Ricketts and Wilks (2002) carried out between 1999 and 2001 looked into the impact of online assessment of students in a university course of statistics. In the first year of the research, the students took a written test and in the subsequent years formative tests using the Internet. The 2000 online test was designed differently than the test in 2001 and the screen scrolling was eliminated. Average online test results in 2000 were significantly worse than those of written tests taken in the prior year. The test results in 2001, after the test design had been improved, were slightly better than the written test results from 1999 This indicates that test design may play an important role in the formative assessment impact