Читать книгу Handbook of Intelligent Computing and Optimization for Sustainable Development - Группа авторов - Страница 21

The data acquired from the eye tracker was cleaned of illegal values and null values and was processed to get the following: (1) saccadic amplitude in the X and Y direction, which is the difference between the gaze and fixation in particular direction; (2) rate of change of saccadic amplitude, in the X and Y direction, which is the saccadic amplitude divided with time difference from one fixation to the other; (3) and change in the pupil diameter, which is obtained from the difference between the pupil diameter of the student captured while debugging the code and the average of the base pupil diameter, i.e., when the student is staring at the blank screen.