09-03-2020, 09:40 AM
Due to the way the eye tracker's parsing algorithm works, blinks are always surrounded by blink-saccades. This happens because the eyelid's movement over the pupil is detected as a rapid eye movement.
Data Viewer provides several options to clean and filter these events and their surrounding data. You can find these settings in the Inspector window by navigating to 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 find these settings in the Inspector window by navigating to 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 that occurs right before a blink.
- Remove Fixation Immediately After Blink: Excludes the first fixation that occurs right after 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 immediately before a blink begins.
- Duration to Exclude After Blink: Excludes a specified duration (in ms) of sample data immediately after a blink ends.
- Apply Blink Correction in the Sample Report: When enabled, this marks any samples excluded by the settings above with IN_BLINK = TRUE in the Sample Report.