In Experiences of Depression, Sidney J. Blatt integrates nearly 30 years of clinical insight and research on the nature of depression and the life experiences that contribute to it. Beginning with case studies of two patients in long-term treatment, this landmark book paints a compelling picture, demonstrating the value of considering the psychological dimensions of depression. In a profound contribution to understanding the nature of depression, Blatt identifies two types of depression that, despite a common set of symptoms, have distinct roots. One, which he terms anaclitic depression, arises from feelings of loneliness and abandonment. The other, which he terms introjective depression, is born of feelings of failure and worthlessness. Recognizing these fundamentally different depressive experiences has spurred a remarkably wide range of research, the development of assessment tools, and impressive advances in understanding the nature, etiology, and treatment of this far-reaching disorder.