I got problem in calculating the acceleration.
I know how to obtain velocity within certain line (eg. dot 1 to dot 2; dot 2 to dot 3)
Since we have the x position and the time stamp (time onset, not the fixation duration, right?).
From the physics I know if I need to obtain acceleration, I need to differentiate △v by △T
But the question is:
what is the △T here? Is it the one obtained from the first delta T ?
I got a diagram for you.