Hi email@example.com. Good question! I suppose that if someone wanted to create a questionnaire where some items were reverse coded this may be useful. I know that for some questionnaires I have seen, you may get various levels of positive or negative points for responses, so your composite score represents the balance between these items. Other than that, all I can figure is that maybe in some fields there are licensing exams that take points away from incorrect answers so this may be possible so tests can mirror these?