# Analysis of the Learning Process through Eye Tracking Technology and Feature Selection Techniques
### Measurement Parameters in Eye Tracking Technology
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**Metric** & **Acronym** & **Metric Meaning** & **Learning Implications** \\ \hline Fixation Dispersion Total & FDT & Sum of all dispersions of fixations in X and Y & It refers to the perception of information in different components of the task. \\ \hline Fixation Dispersion Average & FDA & Sum of all fixation dispersions in X and Y divided by the number of fixations in the test & It analyses the dispersions in each of the fixations in the different stimuli. \\ \hline Saccades Count & SC & Total number of saccades in each of the stimuli & A greater number of saccades implies greater search strategies. The greater the breadth of the saccade, the lower the cognitive effort. It may also refer to problems in understanding information. \\ \hline Saccade Frequency Count & SFC & Sum of all saccades & They refer to the frequency of use of saccades that are related to search strategies. \\ \hline Saccade Duration Total & SDT & Sum of the duration of all saccades & It allows discriminating field-dependent vs. non-dependent trainees. \\ \hline Saccades Duration Average & SDA & Average duration of saccades in each of the AOIs & It allows discriminating field-dependent vs. non-dependent trainees. \\ \hline Saccade Duration Maximum & SDMa & Maximum saccade duration. & They refer to the perception of information in different components of the task. \\ \hline Saccade Duration Minimum & SDMi & Minimum saccade duration. & \\ \hline Saccade Amplitude Total & SAT & Sum of the amplitude of all saccades & \\ \hline Saccade Amplitude Maximum & SAMa & Maximum of saccade amplitude & Newcomers tend to have shorter saccades. \\ \hline Saccade Amplitude Minimum & SAMi & Minimum of the saccade amplitude & \\ \hline Saccade Velocity Total & SVT & Sum of the velocity of all saccades & \\ \hline Saccade Velocity Maximum & SVMa & Maximum value of the saccade velocity & They are directly related to the speed of information processing in moving from one element to another within a stimulus. \\ \hline Saccade Velocity Minimum & SVMa & Minimum value of saccade speed & stimulus. \\ \hline Saccade Latency Average & SLA & It is equal to the time between the end of one saccade and the start of the next saccade & It is directly related to reaction times in information processing. The initial saccade latency provides detailed temporal information about the search process [22]. \\ \hline Blink Count & BC & Number of flashes in the test learner’s report a higher frequency. \\ \hline Blink Frequency Count & BFC & Number of blinks of all selected trials per second divided by number of selected trials & It is related to the speed of information processing. Novice learners report a higher frequency. \\ \hline Blink Duration Total & BDT & Sum of the duration of all blinks of the selected trials divided by the number of trials selected & Blinks are related to information processing during exposure to a stimulus to generate the next action. Learners with faster information processing may have shorter blinks of shorter duration. However, this action may also occur when attention deficit problems are present. These results will have to be compared with those obtained in the other metrics in order to adjust the explanation of these results within the analysis of a learning pattern. \\ \hline Blink Duration Maximum Maximum & BDMi & The shortest duration of recorded blindks & \\ \hline Scan Path Length & SPL & It provides a pattern of learning behaviours for each user & The study of the behavioural patterns of learning will facilitate the teacher’s orientations in relation to the way of learning. The length of the scan path provides information about reaction times in tasks with no predetermined duration. \\ \hline \hline \end{tabular}
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