German: Lehrbuch der Psychopathologischen Untersuchungs-Methoden (from German: Textbook on research methods of psychopathology) is a book written by German psychiatrist Robert Sommer (1864-1937), first published in 1899 by Urban & Schwarzenberg. In its 388 pages, Sommer presents a framework of ideas delving into the core of psychopathological symptoms, employing new analytical techniques and psychophysiological experiments.
Context Sommer studied medicine and philosophy in Freiburg im Breisgau and Leipzig. In 1887, he attained his Ph.D. in philosophy for his dissertation on the relationship between John Locke (1632-1704) and René Descartes (1596-1650). He started working as an assistant, first in the laboratory of Wilhelm Wundt (1832-1920) in Leipzig, and then in a psychiatric hospital in Rybnik in 1889. During this time, Sommer noticed a deficiency in the available tools for psychopathological research. He recognized that some of these tools were already employed in the fields of physics, physiology, and psychophysics. He was determined to adapt and apply these methods to the field of psychopathology and develop new ones, tailored to the special purposes and objects he aimed to investigate. Mental illness was first to be considered as a disease by the Ancient Greeks. During the ancient times, the primary proponents of this view were the Hippocrates and Galen. In the pre-Hippocratic era, a demonological model existed, attributing abnormal behavior as supernatural. The belief that the body could be possessed by evil or domestic spirits, curses, and sin gained even greater prominence during the "Dark Ages" (as seen in the Malleus Maleficarum (1486)). After the 1750s, new philosophical concepts of sensation and perception, advocated by Locke, contributed to a theoretical transformation. His idea that madness resulted from faulty associations in the mental processes, changed the understanding of mental illness. When William Cullen (1710-1790) linked lunacy to nerve irritation and cerebral activity, the concept of insanity being a psychological condition gained wider acceptance. It was not until the 19th century that psychology as a science emerged. At the beginning of the 19th century, the field of physiology emerged, revealing the inner workings of the human body's mechanism. From understanding the cardiovascular system to unveiling the mechanisms of respiration, improving the understanding of human anatomy. From this, neurophysiology was formed, delving into the inner recess of the nervous system, and answering questions about how the neurons and synapses in the human body work. Both physiology and neurophysiology laid the foundations for the development of scientific psychology during the 19th century. Another milestone during this time was the establishment of the first experimental psychology laboratory in Leipzig by Wundt in 1879 which laid the cornerstone for empirical experimentation.
Contents The book is structured into four sections, each about the different methods explaining the human body and its processes. In part 1, "Representation of the Visual Appearance" (German: "Darstellung der optischen Erscheinung"), Sommer explains the visual appearance shown by patients with mental illness and how these aspects are perceived and documented. Part 2, "Analysis of the Movement Process Causing the Phenomena with Motor-Graphic Methods" (German: "Analyse der die Erscheinungen bedingenden Bewegungsvorgänge mit motorisch-graphischen Methoden"), is an extension of part 1. Sommer explains that the external bodily movements observed in mentally ill patients lead to internal change. He notes that the muscle states are dependent on nerve excitations, further describing different methods for researching these nerve or brain processes. In part 3, "Representation of the Acoustic Expression" (German: "Darstellung der Akustischen Äußerungen"), Sommer discusses the difficulty of representing vocal expressions of the mentally ill. He examines different methods for representing language and expressions of patients, while he also notes the potential errors that come along with representing vocal expressions. In part 4, "Study of the mental states and processes" (German: "Untersuchung der psychischen Zustände und Vorgänge"), the focus deepens into the inner workings of the patient, revealing new methods to analyze patients mental states.
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