When Table 2 is examined, it can be seen that the high school students’
test scores are very low and university students’ and physics teachers'
percentages of success are close to 50% in the first-tier. When the scores
are evaluated based on two-tiers, it can be seen that participants’ success
levels fall between 4.5% and 20.5%. This result indicates that students and
teachers selected the correct answers; however, they are not sure about the
answers they have given. Also, it can be said that multiple-choice items are
poor tools for measuring achievement.