TABLE 2.

The precision of fixation and saccade measures during reading by filtering level (unfiltered vs. filtered)

Measure	Unfiltered data	Filtered data
Fixation measures
Duration (ms)	0.959	0.823
Begin time (ms)	0.753	0.756
End time (ms)	0.833	0.666
Mean horizontal gaze position (degrees)	0.020	0.012
Saccade measures
Duration (ms)	0.699	0.734
Amplitude (degrees)	0.048	0.035
Mean velocity (degrees/s)	2.30	2.53
Peek velocity (degrees/s)	2.36	2.32

The values in the table were obtained by computing the average standard deviation for each measure.