def proposed_cut_off_value(cut_off_value, length):
    """Proposes a cutoff-value if cut_off_value < 0 (=default)

    Reynolds and Gutman (1988) recommend using a cut-off level of 3-5 for 50-60 paricipants
    --> 4/55: relation cut-off/ladders

    Args:
        cut_off_value ([int]): [cutoff-value ]
        length ([int]): [amount of ladders]

    Returns:
        [type]: [description]
    """
    
    if (int(cut_off_value) < 0):
        proposed_value = int(length*4/55)
        return proposed_value
    else:
        return cut_off_value