| #### Column names for Saccades Dataframe | |
| Some features were adapted from the popEye R package ([github](https://github.com/sascha2schroeder/popEye)) | |
| The if the column depend on a line assignment then a _ALGORITHM_NAME will be at the end of the name. | |
| - subject: Subject name or ID (derived from filename) | |
| - trial_id: Trial ID | |
| - item: Item ID | |
| - condition: Condition (if applicable) | |
| - num: Saccade number | |
| - start_time: Start time (in ms since start of the trial) | |
| - end_time: End time (in ms since start of the trial) | |
| - xs: Raw x start position (in pixel) | |
| - ys: Raw y start position (in pixel) | |
| - xe: Raw x end position (in pixel) | |
| - ye: Raw y end position (in pixel) | |
| - ampl: saccadic amplitude (degrees) | |
| - pv: peak velocity (degrees/sec) | |
| - start_uncorrected: Start time (in ms as recorded by EyeLink) | |
| - stop_uncorrected: End time (in ms as recorded by EyeLink) | |
| - blink_before: Whether a blink occured directly before the saccade | |
| - blink_after: Whether a blink occured directly after the saccade | |
| - blink: Whether a blink occured directly before or after the saccade | |
| - duration: Duration (in ms) | |
| - xe_minus_xs: Horizontal saccade distance | |
| - ye_minus_ys: Vertical saccade distance | |
| - eucledian_distance: Eucledian distance | |
| - angle: Angle | |
| - dX: Horizontal saccade amplitude | |
| - dY: Vertical saccade amplitude | |
| - ys_ALGORITHM_NAME: Corrected y start position (in pixel), i.e. after line assignment | |
| - ye_ALGORITHM_NAME: Corrected y end position (in pixel), i.e. after line assignment | |
| - ye_minus_ys_ALGORITHM_NAME: Vertical saccade distance after being snapped to line | |
| - angle_ALGORITHM_NAME: Vertical saccade distance after being snapped to line | |
| - lines_ALGORITHM_NAME: Starting line of saccade | |
| - linee_ALGORITHM_NAME: Landing line of saccade | |
| - line_word_s_ALGORITHM_NAME: Number of word on line from which saccade starts | |
| - line_word_e_ALGORITHM_NAME: Number of word on line where saccade ends | |
| - lets_ALGORITHM_NAME: Number of letter from which saccade starts | |
| - lete_ALGORITHM_NAME: Number of letter where saccade ends |