Due to the eye tracker's parsing algorithm, blinks are almost always flanked by "blink-saccades." This occurs because the movement of the eyelid over the pupil is often misinterpreted as rapid eye movement.
Data Viewer provides several options to clean and filter these events and their surrounding data. You can access these settings in the Inspector window under Preferences > Data Filters.
Event-Level Filters
These settings affect entire eye-tracking events (fixations and saccades).
These settings affect the raw sample data around a blink event.
Data Viewer provides several options to clean and filter these events and their surrounding data. You can access these settings in the Inspector window under Preferences > Data Filters.
Event-Level Filters
These settings affect entire eye-tracking events (fixations and saccades).
- Display Blink Saccades: When unchecked, this merges the saccades surrounding a blink with the blink event itself, effectively removing them from analysis as saccades.
- Remove Fixation Immediately Before Blink: Excludes the last fixation occurring immediately prior to a blink.
- Remove Fixation Immediately After Blink: Excludes the first fixation occurring immediately following a blink.
These settings affect the raw sample data around a blink event.
- Duration to Exclude Before Blink: Excludes a specified duration (in ms) of sample data leading up to the start of a blink.
- Duration to Exclude After Blink: Excludes a specified duration (in ms) of sample data following the end of a blink.
- Apply Blink Correction in the Sample Report: When enabled, this flags any samples excluded by the settings above as IN_BLINK = TRUE in the Sample Report.