The contribution deals with methods rather than results. In ad-dition to the conventional experimental scientific methods and the methods used in the humanistic sciences there is also the artistic approach to widen our insight. While less accurate it has a wider scope and might in cases be more pertinent to psychological prob-lems which inherently are complex. The demand for reliability should not be neglected and the different methods might cooperate to check each other. Mutual acknowledgement is a condition for more comprehensive and more speedy results to improve decision-making.