Table 4 The variables used in the released version of HKC.
From: Hong Kong Corpus of Chinese Sentence and Passage Reading
No. | Variable names (abbreviations) | Definitions |
|---|---|---|
1 | FORMAT | The source of materials (two-level, S: single sentences vs. P: passage). |
2 | RECORDING_SESSION_LABEL | The order of participants. |
3 | SENTENCE_OR_PASSAGE_NUMBER | Unique number for materials (S: 1 to 300; P: 1 to 7). |
4 | TRIAL_INDEX | The sequential trial order of the real-time recording (S: 1 to 300; P: 1 to 7). |
5 | IP_INDEX | Page number in a passage (the number is set to 1 for 300 single sentences). |
6 | IA_ID | The ordinal number of the current word (as an interest area) per page. |
7 | WORD | The visual form of each Chinese word. |
8 | TRIAL_DWELL_TIME | Summation of all fixation durations for the whole trial. |
9 | TRIAL_FIXATION_COUNT | Total number of fixations in the whole trial. |
10 | TRIAL_TOTAL_VISITED_IA_COUNT | Total number of unique interest areas visited over the whole trial. |
11 | IA_AVERAGE_FIX_PUPIL_SIZE | Average pupil size across all fixations. |
12 | IA_DWELL_TIME1 | Total reading time, or dwell time (i.e., summation of the durations across all fixations) on the current interest area. |
13 | IA_DWELL_TIME_PER | Percentage of trial time spent on the current interest area. |
14 | IA_FIRST_FIXATION_DURATION (FFD) | Duration of the first fixation event within the current interest area regardless of fixation counts. |
15 | IA_FIRST_FIXATION_X | The X position of the first fixation event within the current interest area. |
16 | IA_FIRST_FIXATION_Y | The Y position of the first fixation event within the current interest area. |
17 | IA_FIRST_RUN_DWELL_TIME2 | The total duration of all fixations in the first run of fixations on the current interest area. |
18 | IA_FIRST_RUN_FIXATION_PER | Percentage of all fixations in a trial falling in the first run of the current interest area. |
19 | IA_FIRST_RUN_FIXATION_COUNT | Number of all fixations in a trial falling in the first run of the current interest area. |
20 | IA_FIRST_RUN_LAUNCH_SITE | Pixels of the horizontal position of the fixation immediately preceding the current interest area, to the left edge of the interest area. |
21 | IA_FIXATION_PER | Percentage of all fixations in a trial falling in the current interest area |
22 | IA_FIXATION_COUNT | Total number of fixations falling in the interest area |
23 | IA_REGRESSION_IN (RI) | Whether the current interest area received at least one regression from later parts of the sentence. 1 if yes; 0 if not. |
24 | IA_REGRESSION_OUT (RO) | Whether a regression(s) was made from the current interest area to earlier parts of the sentence prior to leaving that interest area in a forward direction. 1, if yes; 0 if not. |
25 | IA_SELECTIVE_REGRESSION_PATH_DURATION | Total fixation duration starting from eyes first fixation within the current interest until the eyes enter an interest area of a higher ID. |
26 | IA_SKIP (PS1) | An interest area is considered skipped (i.e., IA_SKIP = 1) if no fixation occurred in the first go-past time. |
27 | IA_SKIP_FULL (PS) | The probabilities of an IA’s fixation count being “0”, specifying that this area was not fixated on during the whole process of sentence reading. |
28 | IA_SPILLOVER | The duration of the first fixation made on ‘interest area (n + 1)’ after leaving the current ‘interest area n’ in the first-pass time. |
