{
  "TaskName": "auditory digit span",
  "InstitutionName": "Ural Federal University",
  "InstitutionAdress": "Yekaterinburg; Russia",
  "Manufacturer": "Pupil Labs",
  "ManufacturersModelName": "Pupil Core",
  "SoftwareVersion": "n/a",
  "TaskDescription": "digit span task",
  "Instructions": "memory condition: memorize sequence of digits presented by recorded voice and reproduce them verbally when a sign of the microphone appears on the screen; control condition: just linsten to the digits. fixate the cross in the middle of the screen when it appears (which is all time during presentation and retention of the digits)",
  "SamplingFrequency": 120,
  "SampleCoordinateUnit": "pixel",
  "SampleCoordinateSystem": "gaze-in-world",
  "EnvironmentCoordinates": "n/a",
  "EventIdentifier": "see _events.json",
  "RawSamples": 1,
  "IncludedEyeMovementEvents": "None",
  "DetectionAlgorithm": "None",
  "RecordedEye": "BOTH",
  "ScreenSize": "n/a",
  "ScreenResolution": "1920 x 1080 px",
  "AOIDefinition": "n/a",
  "CalibrationType": "one point on the screen",
  "PupilPositionType": "pupil-in-head",
  "data_part": {
    "Description": "pupil or gaze data"
  },
  "blink": {
    "Description": "blinks detected by pupil labs software (1 - blink, 0 - no blink detected)"
  },
  "label": {
    "Description": "event codes (described in _events.json)"
  },
  "timestamp": {
    "Description": "timestamp of the source image frame"
  },
  "index": {
    "Description": "associated_frame: closest world video frame"
  },
  "id": {
    "Description": "0 or 1 for right and left eye (from the wearer's point of view)"
  },
  "confidence": {
    "Description": "is an assessment by the pupil detector on how sure we can be on this measurement. A value of `0` indicates no confidence. `1` indicates perfect confidence. In our experience usefull data carries a confidence value greater than ~0.6. A `confidence` of exactly `0` means that we don't know anything. So you should ignore the position data."
  },
  "norm_pos_x": {
    "Description": "x position in the eye image frame in normalized coordinates"
  },
  "norm_pos_y": {
    "Description": "y position in the eye image frame in normalized coordinates"
  },
  "diameter": {
    "Description": "diameter of the pupil in image pixels as observed in the eye image frame (is not corrected for perspective)"
  },
  "method": {
    "Description": "string that indicates what detector was used to detect the pupil"
  },
  "ellipse_center_x": {
    "Description": "x center of the pupil in image pixels"
  },
  "ellipse_center_y": {
    "Description": "y center of the pupil in image pixels"
  },
  "ellipse_axis_a": {
    "Description": "first axis of the pupil ellipse in pixels"
  },
  "ellipse_axis_b": {
    "Description": "second axis of the pupil ellipse in pixels"
  },
  "ellipse_angle": {
    "Description": "angle of the ellipse in degrees"
  },
  "diameter_3d": {
    "Description": "diameter of the pupil scaled to mm based on anthropomorphic avg eye ball diameter and corrected for perspective."
  },
  "model_confidence": {
    "Description": "confidence of the current eye model (0-1)"
  },
  "model_id": {
    "Description": "id of the current eye model. When a slippage is detected the model is replaced and the id changes."
  },
  "sphere_center_x": {
    "Description": "x pos of the eyeball sphere is eye pinhole camera 3d space units are scaled to mm."
  },
  "sphere_center_y": {
    "Description": "y pos of the eye ball sphere"
  },
  "sphere_center_z": {
    "Description": "z pos of the eye ball sphere"
  },
  "sphere_radius": {
    "Description": "radius of the eyeball. This is always 12mm (the anthropomorphic avg.) We need to make this assumption because of the `single camera scale ambiguity`."
  },
  "circle_3d_center_x": {
    "Description": "x center of the pupil as 3d circle in eye pinhole camera 3d space units are mm."
  },
  "circle_3d_center_y": {
    "Description": "y center of the pupil as 3d circle"
  },
  "circle_3d_center_z": {
    "Description": "z center of the pupil as 3d circle"
  },
  "circle_3d_normal_x": {
    "Description": "x normal of the pupil as 3d circle. Indicates the direction that the pupil points at in 3d space."
  },
  "circle_3d_normal_y": {
    "Description": "y normal of the pupil as 3d circle"
  },
  "circle_3d_normal_z": {
    "Description": "z normal of the pupil as 3d circle"
  },
  "circle_3d_radius": {
    "Description": "radius of the pupil as 3d circle. Same as `diameter_3d`"
  },
  "theta": {
    "Description": "circle_3d_normal described in spherical coordinates"
  },
  "phi": {
    "Description": "circle_3d_normal described in spherical coordinates"
  },
  "projected_sphere_center_x": {
    "Description": "x center of the 3d sphere projected back onto the eye image frame. Units are in image pixels."
  },
  "projected_sphere_center_y": {
    "Description": "y center of the 3d sphere projected back onto the eye image frame"
  },
  "projected_sphere_axis_a": {
    "Description": "first axis of the 3d sphere projection."
  },
  "projected_sphere_axis_b": {
    "Description": "second axis of the 3d sphere projection."
  },
  "projected_sphere_angle": {
    "Description": "angle of the 3d sphere projection. Units are degrees."
  },
  "gaze_timestamp": {
    "Description": "timestamp of the source image frame"
  },
  "gaze_index": {
    "Description": "associated_frame: closest world video frame"
  },
  "gaze_norm_pos_x": {
    "Description": "x position in the world image frame in normalized coordinates"
  },
  "gaze_norm_pos_y": {
    "Description": "y position in the world image frame in normalized coordinates"
  },
  "gaze_base_data": {
    "Description": "timestamp-id timestamp-id ... of pupil data that this gaze position is computed from"
  },
  "gaze_point_3d_x": {
    "Description": "x position of the 3d gaze point (the point the sublejct lookes at) in the world camera coordinate system"
  },
  "gaze_point_3d_y": {
    "Description": "y position of the 3d gaze point"
  },
  "gaze_point_3d_z": {
    "Description": "z position of the 3d gaze point"
  },
  "gaze_eye_center0_3d_x": {
    "Description": "x center of eye-ball 0 in the world camera coordinate system (of camera 0 for binocular systems or any eye camera for monocular system)"
  },
  "gaze_eye_center0_3d_y": {
    "Description": "y center of eye-ball 0"
  },
  "gaze_eye_center0_3d_z": {
    "Description": "z center of eye-ball 0"
  },
  "gaze_normal0_x": {
    "Description": "x normal of the visual axis for eye 0 in the world camera coordinate system (of eye 0 for binocular systems or any eye for monocular system). The visual axis goes through the eye ball center and the object thats looked at."
  },
  "gaze_normal0_y": {
    "Description": "y normal of the visual axis for eye 0"
  },
  "gaze_normal0_z": {
    "Description": "z normal of the visual axis for eye 0"
  },
  "gaze_eye_center1_3d_x": {
    "Description": "x center of eye-ball 1 in the world camera coordinate system (not avaible for monocular setups.)"
  },
  "gaze_eye_center1_3d_y": {
    "Description": "y center of eye-ball 1"
  },
  "gaze_eye_center1_3d_z": {
    "Description": "z center of eye-ball 1"
  },
  "gaze_normal1_x": {
    "Description": "x normal of the visual axis for eye 1 in the world camera coordinate system (not avaible for monocular setups.). The visual axis goes through the eye ball center and the object thats looked at."
  },
  "gaze_normal1_y": {
    "Description": "y normal of the visual axis for eye 1"
  },
  "gaze_normal1_z": {
    "Description": "z normal of the visual axis for eye 1"
  }
}