 The Burns Depression Checklist (BDC) is a rating scale for depression copyrighted by Burns.The 1984 version was a 15-question survey; the 1996 revision is a 25-question survey.Each question is answered in the context of "during the past week, including today" and on a scale of 0 to 4, with 0 being "not at all" and 4 being "extremely."