How did Karl Jaspers begin his research work at the University of Heidelberg psychiatric clinic?

In 1909, Karl Jaspers began his research at the University of Heidelberg psychiatric clinic by serving as a volunteer research assistant, a role he maintained until 1915.1

The clinic was directed by the neuropathologist Franz Nissl, who had gathered a team of skilled assistants. Jaspers, driven by a desire to study psychiatry independently and avoid being constrained by the rigid thought patterns of his teachers, negotiated a unique arrangement: he was permitted to work at his own pace and focus on specific patients of interest, provided he did so without a salary.1

During this period, Jaspers observed that clinical psychiatry lacked a systematic framework. He sought to establish psychopathology as a science by developing a precise language for describing symptoms and applying the methods of phenomenology—the direct, non-theoretical description of conscious experience—to the study of mental illness. These efforts led to his influential work, General Psychopathology.1