From the perspective of the editor of Diagnostica from 1995 to 2002, editorial measures for improving and controlling the journal's quality are described. These measures were concerned with adapting international standards of scientific publishing while maintaining German as the publishing language, focusing on empirical papers and maintaining the competition with the "Zeitschrift für Differentielle und Diagnostische Psychologie". After all these changes, however, there remains a large amount of constancy, so that the journal still fits many of the goals which had been written down by its founder in 1955.