The BDI, for example, emphasizes the subjective experience of depression including pessimism and self-punitive wishes. On the other hand, the HRS-D seems to emphasize symptoms reflecting the intensity of depression and its behavioral manifestations. Whereas 29% of a BDI score may be attributable to a physiological factor, 50% to 80% of the total score on the HRS-D is made up of behavioral and physiological (somatic) components. (17, p57)