 For Burns, the BDC replaced Aaron Beck's BDI which appeared in the 1980 edition of "Feeling Good" (that Burns says he was grateful for permission to reproduce).Burns has also developed brief scales to measure depression, suicidal urges, anxiety, anger, and relationship satisfaction, as well as scales to assess the quality of the therapeutic alliance and effectiveness.These scales have high reliability (generally above .90) and each scale can be completed by patients and scored in less than 15 seconds.