def METHOD_NAME(non_steady_state=True):
    """Load the valid confound files for manipulation."""
    conf, meta = get_testdata_path(non_steady_state=non_steady_state)
    conf = pd.read_csv(conf, delimiter="\t", encoding="utf-8")
    with open(meta) as file:
        meta = json.load(file)
    return conf, meta