structural:scholar_edition, stylistic:style_transfer, structural:expansion, structural:reformatting
Impact

The BDI was originally developed to provide a quantitative assessment of the intensity of depression. Because it is designed to reflect the depth of depression, it can monitor changes over time and provide an objective measure for judging improvement and the effectiveness or otherwise of treatment methods. The instrument remains widely used in research; in 1998, it had been used in over 2000 empirical studies. It has been translated into multiple European languages as well as Arabic, Chinese, Japanese, Persian, and Xhosa.