on an AOI Percentage of participant who fixated on an AOI Number of fixations prior to first fixation on an AOI Number of fixation on an AOI Total dwell time on an AOI Pupil diameter Pupil diameter Average Fixation Duration Percentage of participants who fixated on the target Number of fixations prior to first fixation on the target Time to first fixation on the target Number of gaze visits to the target prior to selection Time from first fixation on target to target selection Measures of attraction Measures of Performance