{
    "participant_id": {
        "Description": "Participant identifier"
    },
    "age": {
        "Description": "Age, in years as in the first session",
        "Units": "years"
    },
    "sex": {
        "Description": "Sex, self-rated by participant",
        "Levels": {
            "m": "male",
            "f": "female",
            "o": "other"
        }
    },
    "handedness": {
        "Description": "Handedness, self-rated by participant; note that participants were required to be right-handed",
        "Levels": {
            "right": "right",
            "left": "left"
        }
    },
    "digit_span": {
        "Description": "Total score in Digit-Span Test (Petermann & Wechsler, 2012), assessing working memory capacity",
        "Units": "total scores"
    },
    "randomization": {
        "Description": "Pseudo-randomized group assignment for selection of sequences in sequence trials"
    },
    "session_interval": {
        "Description:": "Interval in days between the two experimental sessions",
        "Units": "days"
    }
}