The course provides an insight into the research field of differential psychology, its research methods and connection to other fields of application of psychology. The focus, however, is on presenting historical, classical and above all modern approaches to personality research and situating them in the current scientific discourse. Theories of intelligence and approaches to measuring intelligence are also presented. In the integrated exercises, partly historical but mainly current texts on the different paradigmatic approaches are read, contextualised in time, and critically discussed. In addition, participants gain test experience and self-reflection by using selected personality and intelligence tests themselves.