The source of the individual character is to be found neither alone in what is innate (Nativism), nor alone in the operation of outer conditions (Empiricism); but on the contrary, every single phenomenon arises through "convergence of outer and inner factors" (the Convergence Theory).
Since, therefore, the inner capacity of a personality is but a single conditioning factor, which must be supplemented by others, it may properly be called a "Disposition." The disposition of an individual shows itself in a series of single tendencies and capacities which fall into two chief groups; that of the innate tendencies (Anlagen, developmental tendencies), and that of the characteristics (Eigenschaften, Beharrungstendenzen).
3. Methodological. New methods for the empirico-psychological investigation of individuality are now being worked out at different places in Europe. The correlation of psychical characteristics is being studied by Spearman and Kruger and by Heymans; Heymans, Sommer and others are engaged upon inheritance of psychic characteristics, the study of families and the like; in England the recently founded Eugenics Laboratory is especially devoted to this problem. With the problem of the mental endowment and intelligence of school children are busy Binet, Meumann, Stern and others. "Pathography," the analysis of distinguished personalities from a psychopathological point of view, has been developed by Möbius and his followers. "Psychography," as the common foundation of all the methods of individual psychology, is being worked out in our Institut für angewandte Psychologic.
4. Problem and Tendency of Psychography. All studies of individuality so far suffer from one common defect: The selection of the characteristics and attitudes which have been tested in the individuals examined has been a matter of chance, dependent on subjective preference or preconceived meaning on the part of the investigator. Each biographer has reported particular marks as "essential" for the characterization of his hero; the rest he has disregarded or merely touched upon. No two alienists have made use of the same experiments for testing the intelligence of their patients; arbitrarily selected individual functions have been regarded as symptomatic. Of like arbitrary selection are all the lists of "mental tests" so far proposed; and accident has in the same way determined the rubrics of the "individuality books" and the lists that have been made use of in many schools. The collection of such lists, questionaries and formularies of individuality, brought together in the Berlin Institut für angewandte Psychologie, shows that a veritable chaos reigns in this matter and that in
