{
    "onset": {
        "Description": "Onset of the event",
        "Units": "Seconds"
    },
    "duration": {
        "Description": "Duration of the event",
        "Units": "Seconds"
    },
    "trial_type": {
        "Description": "Target or non-target",
        "Levels": {
            "target": 1,
            "nontarget": 0
        }
    },
    "value": {
        "Description": "The code (EEG Marker value) associated with an event"
    },
    "sample": {
        "Description": "The sample within the EEG data at which an event occurred"
    },
    "target": {
        "Description": "Current target stimuli matrix cell ID"
    },
    "epoch_id": {
        "Description": "Legacy"
    },
    "session_id": {
        "Description": "Current session number"
    },
    "fingers": {
        "Description": "Dictionary, {stimuli code: finger}"
    },
    "finger": {
        "Description": "Finger being stimulated"
    },
    "ecg_r_peak_direction": {
        "Description": "Target or non-target",
        "Levels": {
            "R-peak is up,": 1,
            "R-peak is down": -1,
            "No valid ECG": [0,2]
        }
    },
    "leading_hand": {
        "Levels": {
            "right": "r",
            "left": "l"
        }
    },
    "reading_finger": {
        "Description": "List of fingers used by participand for daily Braille reading, if any"
    },
    "blind":{
        "Levels": {
            "blind": 1,
            "sighted": 0
        }
    },
    "blindness_age": {
        "Description": "Age of complete vision loss"
    },
    "order": {
        "Description": "Index of the record in the experiment. Failed sessions that have not made it into the dataset are counted."
    },
    "user": {
        "Description": "User ID"
    },
    "reading_time": {
        "Description": "Time of reading Braille text of standard informed consent",
        "Units": "Seconds"
    },
    "braille_display_user": {
        "Levels":{
            "The subject uses Braille display in daily life": 1,
            "The subject does not use Braille display in daily life":0
        }
    },
    "daily_braille_time": {
        "Description": "Self-reported daily Braille usage",
        "Units": "Hours"

    },
    "age": {
        "Description": "User's age",
        "Units": "Years"
    },
    "misuc": {
        "Levels":{
            "Musical experience (except vocal)": 1,
            "No musical experience": 0
        }
    },
    "remaining_vision": {
        "Levels":{
            "Residual vision": 1,
            "No residual vision": 0
        }
    },
    "sex": {
        "Levels":{
            "male": "male",
            "female": "female"
        }
    },
    "blind_years": {
        "Description": "years passed from total vision loss",
        "Units": "Years"
    },
    "congenitaly_blind": {
        "Levels":{
            "Congenital blindness": 1,
            "Acquired blindness": 0
        }
    },
    "reg": {
        "Description": "Session"
    }
}