With pupil response analysis technology, you can clearly see which expressions they are paying attention to by simply asking them to read the text silently, without the need for verbal or written answers or clicking on the options. You can know which options they are trying to choose as well as their hesitation. It is useful to understand their true feelings when they might be hesitant to answer honestly, such as in the case of stress check. From the pupil response to the questions, we can quantify the importance of the question content for each subject, so we can take more appropriate measures based on the importance x answer.