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Hi @rasa, thanks for your query
1) What is saccade amplitude ? (Is it the degree traveled by the eye gaze points every second) ?
No, the amplitude of a saccade is defined as the angular distance the eye travels between two fixations. (It’s a measure of distance, not speed)
2) If saccade amplitude is the angular distance traveled (or degrees traveled per second), doesn’t it mean same as saccade velocity (Since velocity is distance traveled per second ?)
the Saccade Velocity is the Saccade Amplitude divided by the time interval.
3) What other eye tracking features can be evaluated for eye experiment ?
Many other features indeed! We have created an online article that explain in more depth the types of eve movements and what they might mean for analysis. You can read the article @ https://www.tobiipro.com/learn-and-support/learn/eye-tracking-essentials/types-of-eye-movements/
If you would care to elaborate on your project intentions, we should be able to provide more specific information.
Should you have any further questions, please let us know how we can be of help.