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Table 1 Definition of the different ocular measures used in the statistical analysis

From: Detecting concealed familiarity using eye movements: the role of task demands

  Measure Description
Parallel display Dwell time Total time (in ms) that gaze was directed to an area during the first 3000 ms of the trial
First and second dwell-time intervals Dwell time during the period before the dot appearance was divided into two: first interval of the trial (0–1000 ms) and second interval of the trial (1000–3000 ms)
Number of visits Number of times each face area was visited during the first 3000 ms of the trial. A single visit consists of all consecutive fixations on a specific area before moving out of that area
Duration of visits The mean duration (in ms) of visits for each face (during the first 3000 ms of the trial)
Number of fixations Number of fixations on a face (during the first 3000 ms of the trial)
Duration of fixations The mean duration (in ms) of fixations on a face (during the first 3000 ms of the trial)
Single display Mean duration of fixation The mean duration (in ms) of fixations directed to the single-face (during the first 2000 ms of the trial)