Table 3 Definitions and Abbreviations of the Nine Eye-Movement Measures.
From: An eye-movement database of bilingual language control for Chinese-English bilinguals
Eye-Movement Measures | Abbreviations | Definitions | |
|---|---|---|---|
Temporal | First fixation duration | FFD | Duration of the first fixation event that was within the current interest area. |
Second fixation duration | SFD | Duration of the second fixation in the current interest area, regardless of run. | |
Gaze duration | GD | Dwell time of the first run (i.e., the sum of the duration of all fixations in the first run of fixations within the current interest area). | |
Regression path duration | RPD | The amount of time beginning with the first fixation on the critical stimulus until the eyes cross the right-hand boundary of the region | |
Total dwell time | TDT | The sum of the duration across all fixations that fell in the current interest area. | |
Spatial | Saccade amplitude | SA | Amplitude (in degrees of visual angle) of the first saccade entering into the current interest area. |
Fixation count | FC | Total number of fixations falling in the interest area. | |
Skip | PS1 | An interest area is considered skipped (i.e., IA_SKIP = 1) if no fixation occurred in first-pass reading. | |
First run fixation count | FFC | Number of all fixations in a trial falling in the first run of the current interest area. | |
Regression in count | RI | Number of times interest area was entered from later parts of the sentence. | |
Regression out count | RO | Number of times interest area was exited to the earlier parts of the sentence before leaving the current interest area in a forward direction. | |
